From stunt + -fest.
stuntfest (plural stuntfests)
- (informal) An event, film, etc. where many stunts are performed.
2008 April 15, Claudia La Rocco, “Choreographers Cross Over, and Gymnasts Take Flight”, in New York Times[1]:The result is an hourlong stuntfest that, hard as it tries, is woefully short on thrills and artistry.