Trust fall is when you fall back on someone and hope they catch you, and not be a **** and just let you fall.
So to play all you have to do is type "Trust Fall!" and hope the next person decides to catch you.
For the fallers, it is optional to say what you are about to fall on or off.
For catchers you can decide to catch them or not, and if they left what they are about to fall on or off you can (optional) put what happens if you don't catch them. Like if they put :
Trust fall! Over a bed of nails.
(and if you don't catch them) You go:
Doesn't catch them in time. Nails pierce through their body.
And then you go Trust Fall! and so on.
So let's get this ready.
Trust fall!
Off a 5 foot ledge.