The next time an elderly woman tries to get on the elevator I'm going to let the door close and laugh.
I'm not sure I understand. Why would you laugh at an old woman like that?
It's funny because she's so slow.
You shouldn't laugh at older people. Hold the door if you notice someone trying to get on. It's the polite thing to do, and helps everyone move along more quickly.
Nah, I'm going to continue this plan to see if she's as slow as I think.
This really isn't a funny thing to do, it's just impolite. The old woman is just trying to get where she needs to go, and by you closing the door on her you're just making it more difficult. I think you should hold it open.