Only the real pros use that face down second on the floor during burpees to cry 
ugly laughs
like and subscribe and I'll tell you all the places you can cry in a work out
planks are good for it too, esp if you're keeping your neck posture correct
LMAO
what happens between your face and that dirty gym floor is no ones business
Burpees over box jumps 
that is a BOLD and controversial statement, but brave and I respect it
They just end in tears