Ok, now I see where the misunderstanding takes place.
Yes,the engine was cut-off and immediately after he did that he got out off the helicopter. Maybe now you get an idea at what RPM the (freewheeling) rotor was still spinning when he attached those ground handling wheels. I'm not talking about the very final 5 seconds before the rotor comes to a stopp. I'm talking about almost idling RRPM.
Or maybe it's just me having an excessive imagination...
Rest my case.