ORIGINAL: GrantK
Fifth flight I somehow let go of the handle and the plane headed right towards the car hitting the rear left window, A good surprise for my mom and sister inside (good thing they had the window up

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For this reason, CL flyers use a "safety thong". This is usually a loop of strong cord (nylon, leather boot lace, etc.) that loops onto your wrist so if your hand slips off the handle, it pulls on the down line and keeps the plane from getting away. Your Mom would have been upset had you been flying a larger plane (or even the Skyray) and it cracked or put a hole in her window.
George