Is It Fun?

My friend and I were at work today and he told me that he didn't end up going in early. I had asked him why, and he proceeded to tell me a story how he got home at 11pm friday night and went out at 12am got home around "3:30ish maybe four," according to him, but he wasn't too sure because he woke up in his hallway this morning. He told me he had an adventurous night, and that it was so much fun. What I don't understand is how he can have so much fun when you don't remember it?

I don't know how he considers not remembering nights fun. The way I describe fun is hanging out with friends, relaxing and laughing.

PS! If you're reading this ... Heeeeyy! :]