bas lad....you sure seem to have a knack for hitting things!
As a neophyte Army Student Pilot....I once decided to whip some frost off the upper part of the canopy of my Mattel Messerschmidt (Hughes TH-55A).....and while reaching for that bit right in the middle....I lost the Knob that controlled the Visor on my Helmet.
Not much noise....or impact.....but it did make for some confusion when trying to lower the visor later in the flight. A few inches lower and I would have been cheated out of a long career flying helicopters too.
