HOLLYWOOD, Calif. — Dean McDermott was released from the hospital Tuesday, one week after being injured in a motorcycle accident.

McDermott, 43, suffered a collapsed lung when he crashed his dirt bike last Tuesday while he was out riding with friends.

"I ended [up] smashing my chest into my bars as I went over the front of the bike," he recalled Thursday night on Twitter. "It was a freak accident. We still can't figure out what happened. None the less, I have a collapsed lung and bad bruising on my right side. Oh, and 3 stitches in my right butt cheek where a stone got imbedded. Let's just say, I won't be dirt biking anymore."

This is the second time McDermott has injured himself riding this year. In January, he fractured his shoulder in a motorcycle accident at California's Auto Club Speedway.