would never have happened to a Boing.....
Oh yes it would and has, worked for an airline with B747-200's when they were the latest version and has one grounded for the self same reason.
Also seen a few other makes grounded for mishaps with vehicles.
It's not normally the aircraft type that dictates the grounding but the speed which the vehicle hit it at and any skin would buckle when hit at even 30 mph or less in the right place.