10.

To punish the floor

9.

To punish the hoshanos

8.

To punish the synagogue janitor

7.

So that the children will ask

6.

As a zaicher to yitziyas mitzrayim (remembrance of the Exodus from Egypt)

5.

To give us something to look forward to during that long Hoshana Raba davening (prayer service.)

4.

So Judaica salesmen can make a last buck before the holiday season is over

3.

Because speaking to the floor isn�t giving us water

2.

Because the air conditioner is broken

1.

Because hitting our heads against the floor is too painful