Zac Efron was caught doing what he does best — walking around without a shirt — on the set of Baywatch in Miami Beach, Florida recently, and the paparazzi had an absolute field day with a certain scene that required Zac to flex literally every muscle in his body.

As you can see below, a shirtless Zac was tasked with swinging from a rope, something we've seen him do before but wouldn't ever say we've seen enough.

Best of all, Zac is sporting yet another pair of sinfully long board shorts, but it appears he's got something a little more gratuitous on underneath.

Behold, the moment Zac Efron pulls down his shorts to reveal he's wearing an American flag Speedo:

We can only hope and pray this rope-swinging scene makes it into the film with Zac in a pair of budgie smugglers instead of that awful pair of board shorts he was sporting on set the last time we saw him.

At this point, we expect a copious amount of Zac skin in any flick. You know, since we've been so spoiled by the last 20.