S.T.A.L.K.E.R. with Oblivion Lost
I jumped into the barrel to avoid the sniper fire, but I didn't realize that I'm stuck.
Ran over an anomaly and I got floated in my car.
Notice the guards, they didn't even bother to see it.
Also, I ran over the anomaly again, this time in a different location. I'm floating higher and higher...
Campfire guitar time!
That bloodsucker scared the crap of me and I killed him.