15 years ago, young student, I'm walking home around midnight. In the middle of a bridge I see a human shape jumping in the water. I'm not 100% sure. I ask a group of people further up on the bridge if they saw anything, they didn't, but said I still should call 112.
One or two police cars came, and then one (or 2?) fire truck. Lots of people. Some went with full diving equipment in the water.
They couldn't find anyone, said it was surprising as the water was very low. The fireman captain gave me the stinkeye.
Police had left their lightbar on and the car wouldn't start (I think that was the reason) so I helped to push.
I had to come to the police station and tell what I saw many, many times.
Only years later did I realize I was being interrogated, to find out if my story had holes. I was quite naive (dumb works too).
I wasn't drunk, depressed, or had any kind of weird fantasies that would make me want to invent a story. It's the only time I called the cops in my life.
All cops were friendly, even though they must've thought I was lying or had too much imagination.
Did someone jump? Now I think not. But at the time I really thought there was a possibility, and I wouldn't take any chances. I just didn't realize how many people and resources would be involved.



I forgot: I called two more times recently because my phone screen would not turn on, and apparently there's a setting in LineageOS to call the emergencies if you fiddle with the buttons, so as to make the situation even worse, and then there's a voice telling you you're about to talk to someone and you can't hang up! (Edit: I suppose they would call back in any case).
Happened twice before I found the setting. So yeah, I wasted their time, again.