riddle me this, riddle me that

"what is the one thing that disappears when you say its name? silence."

every time i step into my local bank branch, i am delighted to see the weekly riddle, like the one above, scribbled across the whiteboard behind the counter. and so, in the spirit of paying it forward, and taking into account the fact that i spent no more than fifteen minutes dreaming up the following, i now present my collection of the world's worst riddles:

1. i shift from happy to sad the moment you turn me upside down. what am i?

2. it's there when you sit down but it vanishes the second you stand up. what is it?

3. warm me up and i can't stand still. cool me down and i can barely move. what am i?

4. the longer it waits, the shorter it grows. what is it?

5. i always disappear in the light. what am i?

6. i'm sandwiched between two others very much like me - one earlier and one later. what am i?

"it's a mystery wrapped in a riddle inside an enigma." - jfk: the movie (1991)

1. you are correct
2. you are also correct
3. you, too, are correct (water)
4. you are correct, as well
5. moreover, you are correct
6. and finally, you are correct

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