I'll shove the ice-cream down your throat until you suffocate and die. Mission accomplished.
(@Roxeg I'll shove ice-cream down your throat so fast that you won't have time to swallow, um... it does seem slightly weird to me now. Um... the ice-cream... oh, wait, I think I got something. Oh, yeah, a heart attack! Eating too much ice-cream gives you a heart attack. No, seriously, I'm not joking.)
As for my weapon, I'll provide you with an imaginary piece of paper.