I know that is 100% copy, but it would be fun to have a way in which fire can not only fly ... the lines that leave your engine stay forever if you were to hit one of them you lose...
Not sure how it would go with other game modes, but definitely wouldn't work in conjunction with ctf.
my first move would be to jet on and around the flag stand. Tah-Dah! Insta unbreakable defense.