Time

Isn't it amazing how time flies? There never seems to be enough of it.

Your "To Do" list increases faster than it decreases. When you finish one thing you find that there's more to do! How incredibly frustrating!

When you're having fun time seems to cease to exist, but then once you're done you realize just how much time has gone by.

On the other hand, when you're extremely bored time seems to crawl by at a snail's pace.