Just spent the last hour hypnotizing my friends into thinking they are pinned to the ground.
So fun.
I used to do this at slumber parties when I was younger.  You put them on the floor and have them relax and talk them through a vivid situation.  And then you send them through a scenario and about ten minutes later you bring them out of it, and they physically cannot sit up.  Krista's face was so red from trying so hard to get up.
I was pretty proud of myself.  It only worked halfway for Kyle, he was able to get up after a few tries, and Seth didn't work at all.
But it was fun.
Party tricks.