Take it Easy
I find a little alarming the trend this thread is taking. The OP seems to be a working commercial pilot in an EC135 without any aero or airshow experience. Under those circumstances I'd advise caution and strong resistance to any tendency to do anything out of the ordinary.
Most folks don't get to see helicopters fly that much, and the "ordinary" things they do are pretty entertaining when compared to the airplane.
Keep it short and simple, something like a takeoff and 360 clearing turn, then vertical climb to 300' or so, OGE hover, then a very mild bunt into max speed flight with a mild RTT turn, another high speed pass with an "aggressive" decel back to OGE in front of the crowd. Descend vertically to IGE, demonstrate rearward and sideward flight, then hover along a ground track doing 360s. Come up to 100' or so, face the crowd and "bow" the helicopter, then steep approach back to the parking spot and shut down.
Some "routine" like this will tax neither the helicopter or the pilot and will provide fun for the crowd and most important, a great margin of SAFETY. Leave the aero for the folks who've been trained to do it and have the financial backing to do it.