Guild Wars 2

- Centaur tossing.

- Bear tossing.

- Running through a corn field and seeing the stocks sway about.

- My Engineer inadvertently launching herself over a cliff and exclaiming “Feel the fury!” just as she faceplants on the ground.

- “By Ogden’s Hammer, what savings!”

- My Sylvari standing in the Garden of Dawn bedecked in her cultural armor.

- The way my Norn laughs (at people).

- “Swimming, swimming, swimming…”

- The antics of Skritt in general.

…feel free to add your own.

Blowing up bunnies.

Seeing your guild’s colors flying from the castle’s walls

- Synchronized dancing
- Other players who make me laugh (with them, not at them). Like the player who typed out “Breath, kitten you! Breath!” as she was reviving me in WvW. Actually, had she really said “kitten” that would have been even funnier. :-)
- Hydro’s Engineer inadvertently launching herself over a cliff and exclaiming “Feel the fury!” just as she faceplants on the ground.
- Swimming through seaweed beds
- Running through those patches of grass (wheat?) that are taller than most of my characters.
- Figuring out a jumping puzzle on my own

-Doing a flip through every asura gate/portal.
-Aggro-ing everything in the immediate vicinity
-Commanding my necromancer golem to charge into woodland critters
-Constant quickness. All the time. Gogogo.
-/sleep on tables.
-running a jumping puzzle with a world invader, peacefully
-resource gathering next to hostile mobs
-waving at other players in near empty zones
-staring at my bank and debating if I will ever actually use any of this stuff

I always liked finding the highest point on the map and jumping off to my death.
Not sure why but it was amusing. Since gear wasnt broken it was a little cheaper to boot.

forum dweller now that is amusing as well

That feeling when you buy an Awesome Exotic in the Trading Post for 1g