I usually rig the TI completely before backing down the ramp. One time shortly after getting it I tried leaving the amas folded in on the cradles while backing down.
Everything went fine, until I folded them out while on the water - having forgotten to attach the bungees. When I sat on one side of the main hull the other side akas lifted out of the ama and it started to float away.
Naturally I had an audience. This was a weekday - a SCHOOL day - and an entire high school science class was there looking at the aquatic life around the ramp!
Not on my TI, but I also once took my kayak along on a business trip out of town. The city I was working in had several nice lakes so each day I went to work at this location I'd stop by a different one on the way home for a quick paddle. The last lake I tried was waaaay off the highway, really convoluted to get to. Beautiful location though! And no motor boats!
I get to the ramp, pull the kayak down off the truck, get set up - and go to assemble the paddle only to find I had brought the same half of two paddles! Every previous trip I had taken my sit-in kayak and this would have been a real annoyance but fortunately this time I had my Hobie Outback so the paddle was only needed to maneuver away from the ramp long enough to put in the pedal drive!