I'm planning to intentionally knock over a disposable coffee cup that's full of coffee.
Why do you want to knock over a full cup of coffee?
I think I'll knock down everything that comes my way.
Don't knock stuff over purposely unless you're willing to clean it up. Since you likely won't clean this up, then don't do this.
That's stupid. Why not?
It's rude to make a mess, especially to do it on purpose. I'm not sure what you plan to accomplish with this plan, but the world would be better if people didn't choose to mess things up just for fun.