not a laptop but a psion ii. the companies accountant borrowed a psion ii and a landrover to do a job in back of nowhere rural ireland. he needed the landrover to get to the site where no road vehicle not 4x4 would go. he needed the psion for stock taking and a few other tasks.

psion ii is a brick that wouldn't fit in briefcase so was in his hand when going to the car. put it on roof while he opened the door and forgot about it.

got to the motorway before he remembered it and braked, which flung the psion off the roof onto the road ahead of him and which he then drove over. pulled over. retrieved it. it was fine.

was telling another psion owner in ireland this story and they told me of a different accountant who ran over their psion ii with a range rover. and again it was fine.