I have called 911 several times. I’ve also done the aviation equivalent, declaring an emergency on a live Air Traffic Control frequency. Two stories:
The last time I called 911 was on a hiking trail near my house that goes by a small lake. I came upon a guy with a very big, professional looking camera. He asked if I had a phone - I said yes and asked why. He showed me large two puncture wounds on his ankle and said a snake had bitten him while taking photos at the water’s edge.
I told him to sit down, keep still and I’d call 911. The following phone exchange took place:
911: This is the 911 operator, what is your emergency?
Me: I’m on the hiking trails in Smallburgh, USA and there’s a guy here who’s been bitten by a snake.
911: Where are you exactly?
Me: On the trail near Silver Lake.
(Pause, during which I hear typing)
911: OK, where was he bitten?
Me: Right here, next to the lake.
911: NO, WHERE ON HIS BODY??!! [Strong subtext being: “You idiot!!!”]
I later recited this exchange to a friend who is an actual 911 operator and she agreed that I am, in fact, an idiot. Found out later the guy ended up being fine.
My flying story was back when I was a flight instructor. I was taking a girl for her first lesson one day and we were just finishing up and heading back to land when I heard a plane on the common frequency ask for help. Failing engine, right near me.
I responded and it turned out the guy was in an amphibious aircraft over a nearby lake, wife in the plane with him, engine sputtering. Not out of fuel, so it was something mechanical. He wanted help landing at one of the nearby airports, which was a bad idea. Too far, too short runways and the closest was into a headwind. Not wanting to tell him what to do, I strongly suggested he put down on the lake, which he agreed to.
Trouble was, that lake had a lot of people on it that time of year, and I didn’t know if it was legal to land a plane there. But I did know he probably wouldn’t be able to reach the local ATC below a certain altitude. So I told the guy to concentrate on flying the plane and I’d take care of getting him help.
I switched frequencies and keyed up the local approach center. Took a deep breath and said, “Approach, Cherokee 1234 over Lake Smallville. I’m declaring an emergency for another aircraft.” Just using the “E word” on a live ATC frequency sort of took my breath away. The controller took the information, immediately understood why I was relaying in that situation, got EMS organized and asked me to continue talking to the guy.
Meanwhile, my student was freaking the hell out. It’s her first lesson and suddenly she’s involved in a search and rescue operation. I put her to work spotting for me and we eventually got the other plane in sight and watched them land safely on the water. ATC then asked me to have him call on the phone to verify he was down and safe in order to close it out officially. Then they surprised me by giving ME a number to call once I landed, which usually means you’re in trouble. But they just wanted to verify a few things and say thanks.