One of the most famous(favorite?) "group activity" between Asian male youth group.

Here's the procedure:
1. 4(or more) people grab one's both hand and leg.
2. Make sure this person is unable to run off.
3. Open his leg wide open.
4. Use his little brother to push against anything hard enough to crush it

5. repeat step 4 until everyone(expecect the one's being hold) satisfied.

Got the covid-19 vaccine