Glitch: Land in both potions. You will be a dead frog in a bottle and cannot move, but you will be able to swing your weapon and speak in your human form.
Here is something stupid you can do: Open "fight in a breakable room", make a shuriken with 1 restitution, throw it at a ragdoll For some reason, it creates an area where the physics of the game seem completely messed up for a short time, and so wiping out that area.
I epicly failed with a nuke. I tried aiming it towards 2 blues, it missed them, hitting a shield deflecting it straight towards my character, and the explosion also made a mine land directly on my player.
I like using the "take out your own car because it was going full nitro on the wrong side of the road and you jumped to the car colliding with it just in time" technique. Simply keep doing nitro while on the wrong side of the road, letting you get nitro as fast as you use it, and when you're about to get hit jump to that car, the car without a tank full of nitro is less likely to explode. This technique is insane if you are using the green nitro car.
Problem: Sushi cat can get too fat, meaning that you've completed the level, except for the fact that you can't have it register as completed because the cat won't land.