This fast tank was produced in the 30s and saw some service in the Spanish Civil War and the Winter War. The forerunner of the T-34. It was based on an American design that was smuggled out in some secrecy...see the Wiki. Watching the footage below which is from a 1939 movie. Watch part one of this movie 'Tractor Drivers' here.
I can't help thinking the tank drivers would have lost their teeth performing some of these stunts.