IMO there is a high likelihood they will burn up.
Tried it once 12ish years ago, and the ESC started leaving out the magic smoke after 5-10 seconds from what I recall. It was on 2s only so it wasn't some high end ESC(think the ESC was 4S capable) on a onroad motor. Main reason I experimented with it was the plane ESC was something like $40 cheaper then a similar onroad ESC, and figured if it worked I'd save money.