# Thumper

Participants place their hands flat on a shared surface with arms crossed over their neighbors' arms. They pass a single-tap rhythm around the circle in physical hand order, tapping twice to reverse direction or losing a hand on an error.

**Time:** 10 minutes. UWT suggested duration based on the typical 5 to 15 minute band in source notes.
**People:** 4 to 14. Single circle seated around a sturdy table or on the floor; split groups larger than 12 into two parallel circles.

## Choose this exercise

**Purpose:** Track alternating visual cues and coordinate quick physical reactions in an interleaved circle.
**Use it when:** Use as a high-energy, five-to-ten-minute physical warmup to reset attention between focused work sessions.
**Skip it when:** Skip when participants cannot sit close together, have upper-limb mobility limitations, or prefer to avoid close physical proximity.

## Materials and tools

- One shared table with chairs for up to 14 people, or clear floor space
- One stopwatch or countdown timer

## Before participants arrive

1. Arrange chairs snugly around a single table so everyone can easily reach the surface.
2. Ensure the table surface is clear of paper, pens, and drinks.

## Say this to open

Let us take our seats around the table. Rest both hands flat on the surface. Now take your left arm and cross it over your neighbor's right arm so your left hand rests on their side. Look down at the circle: your hands alternate with the hands of the people next to you. The goal is to send a slap around the circle in sequence, following hand order rather than person order. A single tap sends the turn to the very next hand. A double tap reverses the direction. If you tap out of turn, hesitate, or lift the wrong hand, that hand is out and goes behind your back.

## How to run it

### 1. Cross arms and establish layout (2 minutes)

Explain the posture. Every person rests their right hand flat on the table, then reaches their left arm over the right arm of the person to their left and rests that hand flat. Confirm that the perimeter forms an alternating sequence of hands. For example, participant A's right hand sits next to participant B's left hand, then A's left hand, then B's right hand. Remind participants that anyone who prefers not to touch or cross arms may act as the round judge.

### 2. Practice slow sequence (2 minutes)

Demonstrate a slow trial round. Participant 1 slaps the table once with their right hand. The turn moves strictly to the next physical hand in line, which belongs to their neighbor. Run one slow clockwise loop without penalties so everyone feels the difference between physical hand sequence and seating sequence.

### 3. Run elimination rounds (4 minutes)

Start official play. A single tap passes the rhythm forward to the next hand. A double tap immediately reverses the direction back to the preceding hand. If a player taps out of order, false-starts, or freezes for more than two seconds, they remove that specific hand from the table. When a player loses both hands, they step back and assist the facilitator as an line judge. Play until two to three hands remain, or call time at four minutes.

### 4. Debrief rhythm and focus (2 minutes)

Bring all participants back to a relaxed seated position. Gather two or three brief observations on how crossing arms altered visual tracking and reaction time.


## Debrief questions

- What made it harder to react: tracking the sequence visually or overriding your natural person-to-person turn expectation?
- How did the speed or volume of the tap affect the group's error rate?

**Finished output:** A completed round sequence concluding when two or three hands remain active.

## Remote

This game requires adjacent physical limbs on a shared surface and cannot be run authentically in video meetings due to audio lag and spatial detachment. For a remote alternative with similar sequential tracking, run 'Category Snap' instead: establish a strict screen-order roster in chat, then have players take turns speaking one word in a category within two seconds without repeating or hesitating.

## Hybrid

Not recommended for hybrid delivery. Run this game exclusively with the in-person cohort while remote participants lead an equivalent verbal sequence on their screen.

## Access and participation choices

- Participants with shoulder, wrist, or arm strain may serve as the round judge or timer without crossing arms.
- Anyone may choose to uncross their hands and rest them side-by-side on the table, reducing physical reaching.
- Participants may step out to observe at any moment without providing an explanation.

## If the session gets stuck

**Participants tap the table too hard, causing pain or loud distraction.**

Remind the room that a light, crisp tap works best. Mandate flat-palm contact without slamming.

**Debates arise over whether someone flinched or hesitated.**

Designate the facilitator or an eliminated player as the final referee; rulings are instant and friendly.


## Terms used here

- Interleaved hand order: The physical arrangement where each person's hand rests between the two hands of their neighbor.

## Sources and adaptation

Observed in Teampedia as an icebreaker/circle game under the title 'Thumper'.

Retained the core mechanic from Teampedia: crossed-arm circle, hand-to-hand tapping order, double-tap reversal, and single-hand elimination. Added clear posture setup instructions, safe boundary options, a trial round, and concrete judge roles for non-participating or eliminated players.

[Teampedia](https://www.teampedia.net/wiki/Thumper)

Current run sheet: https://unitedwetransform.com/exercises/thumper/