I was watching an auction and planning to bid on it. There was one chip in the group I was interested in.

As I took another look I watched the price skyrocket until a snipe at/near the end made the thing astronomical. Can someone tell me what chip in the group of four caused this? Or do you think it was emotion ("you raise me... I reraise you..")?

The auction link is http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=1069705288