There was an accident in MAN many years ago with a TBL, the aircraft was being towed with engines running when more thrust was applied the nose wheel came loose and mounted the tug. Could have been much worse!
That incident (if it's the same one I attended!) took place
after the pushback and (short) pull forward to the tug release point on the even side of B pier.
Tug had disconnected and moved forward while headset man signed off with flight deck & disconnected.
As headset man started to leave nosewheel area a/c commenced taxi and ran over the tug .. driver "legged it" as the a/c mounted his vehicle