Using the company's desktop computers to solve cryptographic puzzles (like mining) on the company's computers while the boss and someone from the IT were asking to have a look on the machine after one guy already snatched my keyboard.

Very scary moment indeed but surprisingly it turned out: the real reason why they came was because a techadmin recently removed a shared system account but some faulty clients kept flooding the servers with outdated login credentials which also triggered mass SMS on the mobile devices.

Luckily I could somehow take an opportunity to remotely call the script which pulled the emergency brake which I prepared to shut down everything. Close call.

Nowadays I think it itsn't worth to take the risk just to do something that could also be done with the own home computer even it takes five times longer.