About a year and a half ago (on my b-day!) I was riding the bus to work. The stop after I got on, a MASSIVE (600+lbs at LEAST - she needed the "wheelchair lift" to get on the bus...) got on the bus, shuffled down the aisle, SCREAMED at me "MOVE THE FUCK OVER, ASSHOLE!" and before I could do anything, THREW herself into the seat next to me.
There were maybe five other people on the bus, and a ton of open seats.
The initial shock knocked the wind out of me, and her mass literally pinned me to the side of the bus. She actually compressed my ribcage so much that I had trouble breathing. I couldn't even squeak, let alone make any comments about how I'd be glad to get out of her seat.
The driver didn't do anything.
The bus ride took an hour and a half.
Finally, we got to the downtown bus tunnel, which has a series of several stops. I missed my stop (because I was pinned, and incapable of speaking, and probably suffering oxygen deprivation related brain damage by that point) and then, for some reason I don't remember, the guy behind me hit her on the back of the head and made some disparaging remark about her weight.
Well, at first she thought I had done it - and so suddenly I was subjected to not only wailing fists, but flapping wings of blubber slapping my arms over and over again. It was all I could do to protect my face until she figured out who had REALLY made the comment - at which point I slipped over the seat into the seat in front, and exited from the bus post haste, and passed the transit police on my way out of the bus tunnel.
I actually do feel a bit sorry for her - she was obviously mentally ill - but my GOD, I *NEVER* want to go through that again.