Here's a slightly amusing glitch: If you get high enough to perform a sweet impact (where you turn into a cotton candy ball) while spinning from hitting the ground, the cotton candy ball sprite will spin too.
In the burrito geek challenge, I somehow managed to initiate a meteor strike right before the geek hit the third wall (stopping him). The thing is, the meteor strike wasn't canceled, so it continued on to knock the geek through the wall.
It never made sense why in tower defense games that expect you to make a maze don't let you block just because. Wouldn't it make more sense if the enemies would attack your towers if you blocked their path with them?
One of my favorite (despite it being not the most effective) strategies to employ is to sacrifice both teammates, go into psychopath form and proceed to be a physical god for two turns. Spend one of that putting up a free will barrier at your now monstrous instinct level and you get a few more turns of the power trip since even most bosses will have trouble smashing through it.
I like how you can basically give the customer a raw burger but as long as you don't take too long and put all the other stuff on the bun they wanted, they'll still tip you about a dollar.