1321. Tell everybody that "1337" is leet, as in leet speak(using numbers/symbols to represent letters, 1!k3 7h!s). I'm surprised nobody knows about this :P. Maybe I just spend too much time on the internet.
1280. Tell zellinkda it's when you're making a post but somebody else posts before you, and you don't realize it until you've made your post, and it's really awkward.
And might just happen to me right now.
1245. Disconnect parts of CSD's slide so she falls off on the rocky ground below.
EDIT: oh, ok. I know what a comic strip is, I just didn't know what you were talking about since you only said strip.