Well, thank you for signing up anyway! If you can't remember your witty comment (and judging by your substitute, it's a real pity you forgot it), I'm sure some of the other posts on here will inspire even wittier ones.
Also, drink Coca-Cola to combat memory loss. (I don't care if this is ever refuted, I will cling to this for life! It's under the heading Fizzy Drinks: http://tinyurl.com/n987tf)