No but I have dialed 000 a few times ;)

Never had to

Three times.

1. Driving from Chicago to Denver, there was a guy driving the wrong way on the highway. There were four cars grouped by me, all of which were in the right lane. If any of them had been in the left it would have been a lot of dead people.

2. Downed electrical wire flying all around on the side of the road spitting up sparks n shit.

3. Drunk driver flying down the street at like 3am. Swerving all over the four lanes of road on both sides. Front passenger tire was GONE and sparks were flying up in the air about fifteen feet from him driving on the rim.

Had to call the police tons and tons of times as well. Nothing that was an "emergency" though. Just a bunch of "heads ups".

Saw this fat chick, already on crutches, get hit by a car in an intersection.

About 5 years ago in the middle of winter some loudmouthed shnook came banging on my front door at 3 o'clock in the morning, yelling, swearing etc. By the time I got to the door he was at my next door neighbor's house doing the same thing, pounding the hell out of their door. I went out, grabbed him and tossed him over a snowbank. His loud drunken mouth was waking up the whole neighborhood, going on and on about some voices he thought he heard.

I had the phone with me and told him if he didn't shut up and move on I would call the cops. Of course he wouldn't shut up and move on, so yup okay then, I hit 9-1-1. They didn't come of course, he would have had to be visibly armed and waving a weapon around, or killing someone before they'll do anything, but as soon as he saw I was calling he began moving off down the road.... running his loud yelling yapping drunken mouth the whole way.

Felt good tossing him over that snowbank though.

Had a guy break in upstairs while I was in the basement doing some work.I just had surgery and my arm was in a cast.about 10 cops were here within minutes

Just had to this weekend - shouldn't have had to, but did.
I was in a parking garage and the gate to let people out stopped working.
The employees working there just played with the computer for about 20 minutes, and when that didn't work just sat there. I asked them to just lift up on the gate and they said - no they can't do that because there are cameras. I asked what they planned on doing and the plan seemed to be to just keep playing with the computer. There were a lot of people screaming at this point and I said they better figure out the emergency override or I will call the police to do it for them. Still nothing. I called information to connect me to the non emergency number for the police and informed them of the situation. Their reply was that I should call 911. Seemed a little odd to me - I didn't believe anyone was in danger at this point, and didn't believe 911 should be used for this situation. However, with instructions from the police on the non emergency number and nobody from the parking garage willing to do anything I called 911.
As I was giving the address to the dispatcher the employees decided maybe it would be a good idea to call a manager who was apparently 1 block away in another garage. I informed the dispatcher they now were at least trying to get someone over to fix the situation. The dispatcher asked if a car should be dispatched or if I wanted to wait to see if someone actually showed up. I agreed to give them some time to get the manager. The dispatcher told me to call back if they still couldn't get the gate up. I agreed and hung up. Gate was openned about 30 min after start of the malfunction.

Note: this was at 2AM
People were not happy