Now, now Golfer. Don't be so smart:p Maybe the engine's spark plugs were dirty or the plane hit an air pocket?
Seriously though, Beefcake, from the sound of it, stuttering or not. It was probably an engine problem. No doubt the C130 RTB'd. The engine changed and note made in the unit's incident report and maintenance logs. A 'routine emergency', if you will. Happens all the time. One of those things.