What do you think about those clever, funny things to do when you're bored?

Examples:

- Page yourself over the intercom. Don’t disguise your voice.
– Specify that your drive-through order is “to go.”
– Five days in advance, tell your friends you can’t attend their party because you have a headache.

I’m sure you’ve heard of these and seen them on the internet. What do you think about them? Have you ever actually done one? What was it and what was the experience like? Why would you or someone else do something like this, out of boredum or just to get a few laughs?

Have you ever come up with your own? What is it?