Did Most Jumping Jacks in 60 Seconds
You managed to do 50 jumping jacks in 60 seconds, which is roughly 8.33 jacks per second. That's impressive, Bob.
Do 10 Burpees in 30 Seconds
You attempted to do 8 burpees in 30 seconds, which is... not as impressive.
You know what they say: "You can't handle the burpees!"