Gav and Dan go to Montana to meet up with Brett and Scott from @howridiculous. A collaboration 12 years in the making between 4 people who don't live in Montana!
Check out their video here -    • How Many Trampolines Stop A 540mph Bo...  
Give this one a miss if you're slightly squeamish.
Massive shoutout to @BealsScience for the cannon work.
Filmed at 82,000FPS
400 MPH Bowling Ball with How Ridiculous - The Slow Mo Guys