pros wallbang this legit all the time
and the weird mouse movement happens in a LOT of demos, even my own matchmaking demos when the bomb gets planted, its a demo bug, his mouse doesnt actually do this
"Expected from silver rank country"
When the bomb gets planted that turn around happen, so he probably wallbanged the planter, but because of the demo glitch, it looked like he shot the guy in short. It's not possible for a cheat to aimlock that far, Valve patched the info the cheats get a long time ago. Please use your brain.