Describe a time you lost something

I lost my phone on a train about two years ago, on the way back from a work trip, which in hindsight was entirely my own fault — I'd propped it up on the little fold-down table to watch something and must have just walked off without it when we pulled into my stop, half-asleep after an early start. I didn't actually notice until I was already on the platform, patting my pockets the way you do when you already suspect the worst, and by the time I'd worked out what had happened, the train had pulled away. What I did about it was call the operator's lost property line almost immediately, though they were fairly upfront that recovery rates weren't great, and then spent a slightly panicked twenty minutes remotely locking the phone and changing a few passwords from a colleague's laptop, since that felt like the more urgent problem than the device itself. The situation actually ended better than I expected — someone handed it in at the terminal station that same evening, apparently untouched, and I picked it up from lost property two days later after filling in a form and showing ID. I remember being oddly relieved less about the phone itself, which wasn't even that expensive, and more about not having to go through the hassle of resetting every account linked to it. It also made me a genuinely more careful person about where I put things on trains, which I suppose is the one useful thing that came out of it.