(Cover) - EN Showbiz - Shia LaBeouf has revealed the agony he experienced while filming stunt scenes in a harness for the new Transformers movie.

The star reprises his role as Sam Witwicky for Transformers: Dark of the Moon and the character was involved in a series of risky sequences. To ensure the actor didn't get injured, he was strapped into a safety harness with wires but Shia didn't enjoy the experience because the equipment put a lot of pressure on all the wrong places.

"Yeah, I don't like the wires," he told MTV News. "Really, you can ask any man, Would you like me to take my shoelace off, tie it around your nuts and then hang it from a chandelier on the ceiling?'

"And then while you're up there hanging from your testicles, I need you to scream, 'Optimus!' which makes the testicle condense inside of the shoelace vice. Would you enjoy that?"

Shia's co-star Rosie Huntington-Whiteley also had to wear a harness for some of her adrenaline-fuelled scenes. The beauty admits she wasn't expecting to wear the safety gear and insists it was just as uncomfortable for a woman as a man.

"I was on set watching my stunt double do her thing; she was sliding down this 100-ft [mobile set] that was at a 40 degree angle on what was basically a skateboard, headfirst," she explained. "Then Michael [Bay] says, 'OK, get Rosie in the harness!' They thrust this man's harness at me, which is placed to be in all the wrong places for a woman's body and is excruciatingly painful for three hours. Whatever it does to a man, it also does to a woman."

Tyrese Gibson, who plays Robert Epps in the movie, admits he had a slightly easier time in the harness. The actor claims his shapely body helped to ease the pressure. "Thank God I have a bigger ass so when you put the harness on, the ass is able to help you stay away from the front part," he quipped. "So thank you, Mom, for passing on the booty meat to help me get through this." (C) Cover Media