I've been known to laugh out loud. But yeah, the phrases are overused. Still, you know what they mean. LOL if something is funny, ROFL when something is extremely funny. Regardless of what the acronyms mean.
Also: Peterson's Vogelgids is a classic. You're a privileged man to have seen that live, Sven.
I have no idea why, but for some reason, this Mythbusters segment always cracks me up:
Maybe it was the whole buildup to it, and seeing something so cartoony work so well in reality.