Thanks, robm.
I must admit that I cheated on this last list. After creating it, I switched #1 & #2. I though the Pong one was funnier, so I made it #1.
Sometimes I come up with a good one in my head and save it until near or at the end, but I usually just type them as I think of them.
I can write humorous poetry the same way. I am thinking of starting a thread where I randomly, at any time of day, ask for a subject for a poem. Then, the first person to reply with a subject is the one I go with. Then at a future time, I do it again. I have written some of my best and funniest stuff in the past from suggestions.