I did Flame Leviathan 10man today with 3 towers up, and noticed a cool thing. I was on launch duty, and we did the Launch, bike passenger jump out, and get in the launch demo way.
Anyway, about 5 seconds before FL died, I jumped in to a bike as a passenger.
As usual, all the vehicles was destroyed when he died, exept mine! The driver in my bike got kicked out, but I stayed in it.
So all I had to do was to switch seat to the driver seat (not by jumping out, but by clicking the grey bike icon), and I could drive it! I don't think someone could get in as my passenger, but I'm not sure.
It seems like the bike does break when you exit FL's room (towards Razorscale/Ignis), but there might be a way around this. I'll try it again next week aswell.
I was so excited about the bike, so I forgot to take a screenshot tho :<
Also, FL died when he overloaded (stunned), not sure if that matters though.