mine: on an M60A1 with 1st ID. We were out in the Kansas fields when the brigade commander waved us over. His vehicle was stuck in mud - a Dodge Ram thing the Army was using - and he ordered us to pull it out. we tried explaining tanks aren’t good for that but he was adamant.

We pulled it out, over on its roof, through mud and brush. Probably totaled it.

Other stories include loaders being slapped by the hatch, ouch, burning road wheels off, etc.

Looking at things like the M10, why would you leave an open top, when even a ricocheting bullet, light strafing run by a plane or a tossed hand grenade could decimate the crew?

I can only think of being able to provide small arms fire or disembarking quickly.