Three blondes are attempting to change a light bulb. One of them decides to call 911:

Blonde: We need help. Were three blondes changing a light bulb.

Operator: Hmmmmm. You put in a fresh bulb?

Blonde: Yes.

Operator: The power in the house in on?

Blonde: Of course.

Operator: And the switch is on?

Blonde: Yes, yes.

Operator: And the bulb still wont light up?

Blonde: No, its working fine.

Operator: Then whats the problem?

Blonde: We got dizzy spinning the ladder around, and we all fell and hurt ourselves.