Fake pool. Pretty cool illusion

Step 1: Gather friends
Step 2: Wrap each other in sheets
Step 3: Tie fake cinderblocks to feets
Step 4: Lie at bottom of "pool" in convoluted positions
Step 5: WAIT

Its awesome

Geinous. ^^

Whoa! How?! :0

Go under when no one else is there wait until some one comes (is on the top) start choking and fall to the ground and lay very still