From WENN.com

The former Will & Grace star decided to mark his 42nd milestone with an adrenaline-boosting ride with friends at the Navitat Canopy Adventures park in Wrightwood, California.

The birthday boy later took to Twitter.com to share a photo of himself in a safety harness and protective helmet, as well as a video clip of him zooming along a cable high above the San Gabriel Mountains.

He tweeted, ""Thanks for all of the birthday wishes today. Here's... how I spent my birthday today - Zip Lining in Wrightwood, CA. It was SO much fun!!!""