What is Monster Jam? And what happens

Monster Jam is one of the worlds biggest Monster Truck competition, that is  held throughout the whole year with more shows during the winter than the summer, and travel around the county in U.S. and Canada.
Monster jam shows
Monster Trucks face off in two different forms of competition - Racing and Freestyle. In the smaller shows they have a wheelie competition and / or a donut contest or sometimes even both.