Personal favorite (and only because it's happened three times recently): I'm taking a lane that, 50 yards ahead, becomes a RTOL. JAM behind me needs to make the right. I check shoulder, see that they're well back of me and maintaining speed and there's no one in the left lane. I signal that I'm merging left...and suddenly hear an engine racing as the JAM accelerates and passes me on the left WHILE MY ARM'S EXTENDED, nearly hitting my hand.

I've "educated" the JAMs who've done this to me, as they've all been pulling into a parking lot at the end of the RTOL.

And, just for a change of pace, the last one who did this to me passed me on the right by driving through a breakdown lane on a bridge. She was particularly brilliant. I couldn't catch her, but I saw that she pulled into a day care place with her kid. I went to the day care place and had all the office staff come outside so I could identify to them which car she drove, what she had done, etc.