When Colin Creevey gets petrified in The Chamber Of Secrets, Harry sees Dumbledore and McGonagall bringing him in the hospital wing.
He describes them as if they were carrying a statue.
Why would Dumbledore and McGonagall, pretty old (and thus physically weak) but pretty skilled wizards, would takeresort to the inconvenience of carrying things like petrified people by hand instead of using magic to lift them?
Using magic would seem both safer for the carrier and for the carried.
