I was driving my Freightliner pulling a  flatbed , going north on I-95, moderate traffic,right side lane, going about 65. I looked in my rear view mirror, saw what appeared to be a 'cross' coming up behind me in the left lane, about to pass me. Looked very strange.
Cross turned out to be a 'crotch rocket' style bike, doing a wheelie ( driving on rear wheel only ) and passed me. He had to be going 80 on one wheel, passing me on the interstate, and when he got maybe 200 yards ahead of me, he dropped the front wheel back down on the pavement, and then he REALLY took off .  I mean fast.
Several local bike riders said they have, late at night, had very fast races while on one wheel.

Not me.