Our old cat vanished a couple of times, for a couple of days, came back a bit grubby and hungry each time. No idea where he went but I assume he got himself stuck somewhere, or shut in a shed.
When he was getting quite elderly he disappeared again - hadn't really been roaming much as his age increased so we were more worried when he wasn't there when we got home from work, didn't come when called, didn't come home for dinner...
Around 8ish there was a knock on the door from one of three enormous Eastern European chaps who houseshared on the next street over. Massive muscular guys, all three looked ex military.
"I have your cat". Totally deadpan.
I wondered for a moment if it was a ransom request or similar, but he beckoned me to go with him and when I got to their house, there was our motheaten old cat snuggled up across the laps of the other two chaps.
"I see your cat always, he lies in the sun on your windowsill. He was there this morning, laying in the sun. A man walked past and shouted at him. He frightened your poor cat."
At this point he drew himself up to his full height and gave me an utterly evil grin
"So I, er, frightened him"
Apparently he'd chased the shouty idiot off, scooped up dcat like a hairy little damsel in distress, and took him home for a day of intensive TLC 😁
Hope your little gremlin is back with you soon!