# One-Line Electric Fence A small group plans and moves all active members across a suspended horizontal line without touching the cord or breaking physical contact. The team tests coordination, physical spotting, and shared constraints. **Time:** 20 minutes. Matches the 15 to 20 minute source duration band from Playmeo. **People:** 4 to 8. Single group of 4 to 8 participants. ## Choose this exercise **Purpose:** Coordinate physical support and adhere to strict shared movement constraints without contacting a suspended boundary. **Use it when:** Use in an outdoor or gymnasium experiential learning session when an agile group requests a tactile problem-solving initiative. **Skip it when:** Skip when participants have back, joint, or mobility restrictions, or when the group prefers not to engage in close physical handling or lifting. ## Materials and tools - 1 elastic bungee cord or soft rope (approx. 4 to 6 meters long) - 2 sturdy anchor points (trees, posts, or gym standards) - Measuring tape - 1 whistle or buzzer (optional penalty signal) ## Before participants arrive 1. Anchor the bungee cord horizontally between two stable supports at a height of 1.0 to 1.2 meters from the ground. 2. Check the ground surface beneath and around the cord to ensure it is level, non-slip, and clear of tripping hazards. ## Say this to open Your goal is to move everyone in your group from this side over the cord to the opposite side without touching the line. Everyone crossing must remain physically connected to the group at all times. Safety rules are strict: no throwing anyone, heads must stay upright above waist level at all times, and spotters must keep two hands up to support torsos on every lift. Before you begin, you will agree whether a cord touch or broken contact resets just the person involved or the entire team. ## How to run it ### 1. Brief, establish rules, and plan (5 minutes) Deliver the opening script and safety boundaries: no diving, no head-down transfers, and spotters must actively cradle torsos. Prompt the group to agree on their penalty reset standard: decide whether an infraction resets only the person who touched/broke contact or the entire team back to the start. Anyone may opt into a non-crossing safety spotter role at any time. Give the team 4 minutes to inspect the line, assign roles, and map their physical sequence. ### 2. Execute first crossings (6 minutes) The group begins transferring members over the cord. Check that moving members maintain continuous contact (holding wrists, arms, or clothing). Watch the cord closely. If someone touches the cord or breaks group contact, sound the signal and apply the team's chosen reset rule immediately. ### 3. Adjust and complete crossing (5 minutes) The group adapts its tactics to transfer remaining participants, solving the problem of the final person who has no lifters remaining on the launch side. Call time when all active crossers stand safely on the far side or when the clock runs out. ### 4. Debrief (4 minutes) Gather the group on the finish side. Ask 2 questions about planning, spotting responsibility, and risk management. Take up to 3 participant responses. ## Debrief questions - How did the team decide who would cross first and who would be the final person left on the launch side? - What explicit actions did crossers and spotters take to ensure physical safety during lifts? - How did your agreed reset rule affect how cautiously or quickly the team moved? **Finished output:** The team either lands all active crossers on the far side without cord contact under their agreed reset rule or reaches the time limit. ## Remote This physical task requires in-person spotting and physical contact and cannot be run online without becoming an entirely different activity. For an online constraint-coordination challenge, run the classic River Crossing logic puzzle using a shared digital board with boat capacity rules. ## Hybrid Hybrid delivery is not recommended. If running with a mixed group, remote participants may serve as rule observers and clock monitors via live video, but they cannot take part in physical lifting or spotting. ## Access and participation choices - Any participant may opt out of being lifted, lifting others, or maintaining physical contact at any point without explanation. - Participants who do not wish to cross can serve as official safety spotters or clock monitors. ## If the session gets stuck **A participant attempts an inverted or diving maneuver over the cord.** Halt play instantly. Remind the entire group that heads must stay upright above hips and torsos must remain supported by spotters before resuming. **The team struggles to transfer the final member across because no one remains on the start side.** Pause the clock for 30 seconds. Prompt the team to look at how members already across can lean back over the line to establish grips while keeping their own balance. ## Terms used here - Spotting: Standing in a balanced, ready stance with hands up and eyes on the moving person to catch or support their torso if they slip. ## Sources and adaptation Observed in the Playmeo activity library, where it is credited to Mark Collard. The electric fence setup is a widespread traditional low ropes course problem-solving initiative. Retained the core Playmeo parameters: 1.0 to 1.2 meter cord height, continuous physical connection, and reset penalties for touches or breaks. UWT standardized the proactive safety briefing (upright posture, torso spotting, no throwing), made the penalty reset standard an explicit pre-agreed team decision during the planning step, and established the non-crossing safety spotter role. [Playmeo](https://www.playmeo.com/activities/team-building-problem-solving-activities/one-line-electric-fence) [Playmeo](https://www.playmeo.com/activities/team-building-problem-solving-activities/one-line-electric-fence/) Current run sheet: https://unitedwetransform.com/exercises/classic-team-problem-solving-challenge-one-line-electric-fence/