You can throw them at people, by holding it between your index finger and thumb and then flicking it at a person/object.
They do this at venues too like sports games, people throw 'em at performers/athletes/other jerks in the crowds. It's annoying but it's a skill we all need to learn.
I've been there and done that. Throwing mushed up apples that still have the skin intact is funnier and more assholish to do anyhow.