Matt Smith has revealed that he collapsed during the filming of a scene in the freezing weather of the Baltic Sea for an episode of Doctor Who.
The freezing temperatures - and the actor's refusal to use a stunt double - led to his collapse and Smith had to require medical attention.
So I went into the sea three times. It was the coldest I've ever been," he added. "The next shot we did, we were running along the beach and I was suddenly so frozen I just hit the deck. I couldn't move.
The article doesn't reveal when this all took place.
Please Matt! don't scare us again like that OK?