Coming back one day from a charter flight, I was told to take an older couple and their daughter from out of town up on a local sightseeing flight. I figured they thought I looked real smart as I escorted them across the ramp, leading the way in my crisp charter uniform. The helicopter was parked on its dolly and, as I arrived at the aircraft, I took an energetic leap to get up onto the platform. When I did, my foot slipped off the side and I fell flat on my face, half on the dolly and half on the concrete. Looking around, clutching my jaw, I saw my stunned passengers slow down, hesitate, unsure if they still wanted to get into the air with a pilot so lacking in motor skills.