Sonic 3 + Sonic Knuckles, my nephew (slightly older than me) watching and cheering me on as I reach the final stages, I grab the last emerald after failing to do so a few times, nearing the final boss encounter when we're interrupted and asked to go to the supermarket. We insist we can't but it wasn't an option, so we pause the game and go.
We return, hoping that nothing went wrong in the meantime, press start to unpause the game. Nothing happens. Press all the keys in the controller, nothing happens. Unplug and plug back the controller, nothing happens.
We stare blankly at the television, at the frozen picture of Sonic going full speed in Super form and coming to the realisation that we lost all of our progress and effort.
My nephew begrudgingly resets the console. We look at the start screen, turn the console off again and go outside to stare at clouds.