The UH-34 wasn’t the only helicopter flying at Brewster.  As I was driving towards the exit, I heard the sound of a turbine whining.  I pulled over to the side of the road and saw that the Life Flight helicopter was running up.  I headed to a piece of higher ground that overlooked their space.  The Agusta 119 Koala was sitting on a trailer and warming up.  It then pulled up in to a hover and transitioned to the grass.  A moment later, back to the hover and back to the trailer.  This was repeated a couple of times.  It didn’t seem like they were actually going flying unfortunately.  As they ran down the RPMs, I figured it was time to move on again.