When he landed, cops and journalists were already waiting for him, and when one of the latter asked him why he had done it, he replied, "a man can't just sit around."
So let that be your motto for the day. :) (I realize that the 2nd of July, which is when he made his flight, would be a better choice than the anniversary of his death for what one might dub "Lawnchair Larry Day", but it's not July anymore, so there. :) I'll rectify this next year, though.)
(Incidentally, the Wikipedia article on Lawnchair Larry is one of those articles that I started myself, almost seven years ago now.)