People who were fired on their first day at work/saw somebody get fired their first day at work: What happened that led to the firing?

Worked security at a factory that made kitchen appliances. It wasn't his first day, but it was his first shift by himself.

There's a gate at the front that you lock when you go on rounds.

Dude chooses to go on a round 5 minutes before shift change for the factory workers. He gets a call on company cell that folks are at the gate. Instead of coming back, he tells them to wait 20 minutes so he can finish his round.

20 minutes where they won't be getting paid.

Second in command big boss of the factory is out there checking IDs and directing traffic when dude gets back from his round. Now this dude is nice. Genuinely one of the nicest people you'll ever meet. Old union rep, shirt off his back type. Tells guard not to worry about it, all's good. Just time his rounds better next time.

Guard starts screaming at him about how he had no right to undo the lock, to get out of here, he'll handle them, and if he wants to make them wait that's his right. Boss man tells him to chill out, he won't get in trouble, just go do his log and then he can take over checking IDs.

Guard pulls out, in one hand, a mag light flashlight he was told not to have, and in the other chemical spray that's illegal for a guard to carry without certs (which he didn't have), and this is an unarmed site. Threatens to ""arrest"" him. When boss pulls out his cell to call the guard company, the guard sprayed him and knocked his cell onto the ground, and kicked it across the parking lot, breaking it.

Needless to say, he was fired. Boss didn't press assault charges, but we nearly lost the contract.