Don't get stabbed. It makes everything awkward.
Kissing is something that makes up for a lot of other crap you have to put up with...It can be confusing and weird and awkward, but sometimes it just makes you melt and forget everything that is going on.
It's always awkward when someone doesn't realize you're joking and devotes thought time to what you've said. Double that when the person is wearing tinfoil.