04/12/2010 05:12 am ET | Updated May 25, 2011

Topher Grace Talks Getting High With Ashton Kutcher (VIDEO)

Topher Grace first got high at a charity event with Ashton Kutcher, he said on 'Lopez Tonight' Tuesday, when a girl offered him a breath strip.

"I took it from her and this is where I should've known something was weird because she said, 'do you want half, it's really strong?'" he said. "I said, like a rock star because I didn't know what was happening, I said, 'Babe, I think I can handle an entire breath strip.' I just popped it in."

Luckily one of Topher's friends was there to hold his hand and get Ashton involved.

"I said just real quick, 'Is there lava coming out of the back of my head?'" he said. "My friend said, 'Are you ok?' and I said no, 'I think I'm fine but I can touch colors, should I get naked?'...I did
everything that I was ever trying to not do, which is too much of a cliche of someone stoned on 'That 70's Show.'"

Topher is promoting 'Valentine's Day,' out Friday, in which he costars along with Ashton and George Lopez.