On the Huey, with the engine running (and hydraulics on) you could tap one pedal (with the feet off the other pedal) and it will motor all the way to the stop - causes some consternation to ground crew if you are sitting on PSP or some other slippery surface.
As Gomer says, there is little feel to a hydraulic pedal, and even on the R22 there is almost no feel - when in a stable hover it is possible to lift the left foot off the pedals, and the right foot is applying just a little pressure to hold the position (which is left pedal forward a bit, of course - but the pedals want to go further left-forward, so the right toe stops this.)