Your, best WTF moment in gaming.

[digoraccoon]

In a past Gurps Supers game, I joined in a session late, making an alien bounty hunter who came to Earth for a wanted galactic criminal. The WTF moment was how the GM managed to get me to meet the team despite my derailing start:

My character's equipment was damaged in the flubbed landing on Earth and he had no Earth money to but needed materials to repair them. However, he disguised himself as a native and learned to barter food and water with a small group of homeless people under an Interstate overpass for materials (stolen goods) that my character could use to repair his equipment.

This same group of hobos were being bothered by a local street gang trying to expand their territory. I decided to help the homeless defend their... uh "home" by building them some improvised weapons (zip guns, pipe bombs, blades, etc). When the gang returned to chase off the hobos, I brought out my now functioning alien weapons.

Any my "Hobo Army".

The ensuing fight was enough for citizens to call out the police. An alien with weaponry that was making swiss cheese of their patrol cars was enough for the police to call out S.H.I.E.L.D. for help.

What I didn't know was that the other players were all Supers working for S.H.I.E.L.D. and boy was I shocked when they showed up to kick my arse and arrest me, LOL!
After an amusing interrogation, I was allowed to join the team provisionally because my bounty was the same one S.H.I.E.L.D. was currently investigating.