Had a Tamiya 1/10th Ferrari F40 (electric) about 15 years ago. Had a hot motor and electronic speed controller etc (just when the speed controllers were becoming available).
Got hold of a small crown wheel not designed for it, and a big pinion (ran out of adjustment to keep the pinoin in contact). Was geared to do about 70km/h.
Rolled it many times. And did a Mark Webber (Merc Benz LeMans car) trick a couple of times too, thanks to clipping a rock and the flat bottom doing the rest.