Ballistic Ping Pong Ball vs. Tennis Ball at 450km/h!

NightHawkInLight improved upon the rig by using disposable plastic cups with an o-ring instead of foil or film for the destructible end cap. Might want to look through his videos for it. Cups are available at any convenience store and getting the vacuum cannon ready is a heck of a lot faster. (Like less than a minute to jam on the plastic cup vs. whatever time it takes to smooth out and avoid tearing while stretching a cover over the end.) Just thought I'd put that out there for anyone interested in this kind of thing.