Both scares during water changes.
Once a harliquin jumped out and only AFTER the water change did I notice him - popped him straight back in & is still fine today.
The second time was WIERD: OK, so I do my weekly water change and everything is tickity-boo. Go and get a coffee for my efforts & on the way to the lounge I notice what looks like a huge winged slivery insect crawling across the hall carpet up against the skirting board. I dump my coffee down & go back to investigate well Intreagued - huge insects don't really occur in the UK.
So i'm down on my hands & knees thinking 'what the
hell is this thing, it look just like a shrimp....'
PANIC
Shrimp are orrid things to pick up (you know, like crabs or indeed a large insect), so I just literally pick it up, run to the tank and bung him in. He's still alive today! My shrimp had crawled at least 5 meters across difficult terrain (carpet) and survived! It must have taken him at least 30 mins to get that far!
Now I regard shrimp as the ultimate escapologists - they've escaped before (disappeared) from my covered tank. One day I was fixing up my PC that sits on the floor and THREE dead shrimp were behind it
. They can escape from the smallest hole (that I have now taped up on my lid) and when they do escape seem to be attracted to light - i.e. the blue lights of death on my PC, and the light shining through my front door that attracted the one that survived his bid for freedom.