Just ask British icon Daniel Radcliffe!
The only problem??
Just look at their sad, sad faces!!
Ch-ch-check out the clip to see Anna & Justin's priceless reactions (below)!!!
[Image via itv.]
Workin' on his fitness!
"I did about 700 that day because we did many takes, many angles. They didn't want me to sound I was giving any effort whatsoever."
Ferrell chimed in on shooting the scene:
"I think it's the funniest scene that Mark doesn't break a sweat."
Well, Mark did have a little help from a crew member helping him up… but after a few hundred, hey, the guy's earned the assistance, right?!
[Image via WENN.]