Jack Black's director on 'Gulliver's Travels' "felt guilty every day" for what he put the actor through on set.

Rob Letterman helmed the movie - which stars Jack as travel writer Lemuel Gulliver who takes an assignment in Bermuda, but ends up on the island of Liliput, where he towers over its tiny citizens - and he admitted shooting one of the most physically demanding scenes on their first day was not the best idea.

He said: "I felt guilty every day. The first day of shooting, and it was my first time shooting a live-action movie, we did this one scene with Jack in this whirlpool storm in the Bermuda Triangle. We shot on the backlot at Pinewood Studios in England, in February, which is not warm at all, and he had to pretend to be in the Tropics on a boat, while we were using wind machines and rain machines and water cannons. For some reason, we decided to start with the hardest scene. I don't know what we were thinking. And then, a storm blew in and things started crashing and cameras started breaking."

However, Rob revealed despite all the hardships Jack faced on the movie he "couldn't have been nicer".

Rob told Collider.com "The Wire on Jack was live and I could hear him saying, 'Rob, Get Me Out Of Here.'That was the first day, and I was like, 'Oh, my god, he's going to hate my guts.'By the end of it, I had tortured that poor man and he couldn't have been nicer. I made him take his shirt off and we shot him in slow motion, shooting him with cannonballs. He is a trooper."