A special charity auction is being held online benefiting Jayni and Chevy Chase’s Center For Environmental Education. The highest bidder (and a friend) at the auction will get to spend a day with Downey on the set of Iron Man 2 in Manhattan Beach CA, including time with the actor in Downey’s trailer.

The Center For Environmental Education is a non-profit organization that helps create environmentally-friendly and health-oriented schools across the nation. The auction closes on September 23rd; as of this writing the highest bid is $17,500 (after 19 bids) with the next bid placed at $20,000.

This is far less expensive than a seat on the next Russian space mission, and the proceeds go to a better cause.