I did a very similar thing!
My friend (A-level drama student) had been asked to host an assembly, he had to put together a play based on some religious story, a script had been written up, I forget what it was about, but basically God was teaching some people how to be nice to each other. BORING!
However, he needed someone to play God, step forward Shadow
They had me all dressed up in a long gown, wispy beard and halo, it took about two hours to get me all dressed up and I really looked God-like.
However I had managed to sneak a load of gold Christmas tinsel into my sleeves, so right in the middle of the play I bellowed:
"I AM YOUR GOD!! BOW DOWN BEFORE ME!!!!!"
And threw the tinsel into the crowd making thunder noises and screaming at people, I then continued with the play as if it was all part of the show.
I got suspended for a week.