Bob, I commiserate fully. When I took the Basic Rider Course in 2007, The loosey-goosey throttle control in the school-provided rice mill got the best of me, and I ended up dropping the bike in such a manner that the crankshaft-end housing landed on the inside of my right leg, halfway between ankle and knee, pinning my leg to the pavement. I couldn't get leverage to extricate myself, and had to endure the indignity of the instructors lifting the bike off me. There was immediat swelling, but no bleeding or pain. Fortunately, the incident occurred the second morning of two full days of road training and testing, and I passed the exam anyway. (The severe swelling, accompanied by a huge black bruise, caused me to spend that night in a hospital emergency room for X-rays, CAT scan, and MRI—the docs were concerned about possible "compartment syndrome," which supposedly can require amputation if not treated surgically.)
Postscript: That experiance not being bad enough, six months later I was running across my lawn to answer a ringing telephone when I fell onto the upturned blade of a garden hoe, injuring the opposite side of my right leg at almost the same distance above the ground. There again was no bleeding, but there was huge swelling and discoloration, this time accompanied by intense pain. The result is that six years later my lower right leg is (perhaps permanently) somewhat larger than the left, and there is dramatic discoloration from instep halfway to knee that has not gone away. As a consequence, I no longer wear shorts outside the house, even in summer heat.
I hope your injury has healed normally.
Afterthought: A distinct advantage of boxer BMWs (with or without engine bars) over vertical twins is that the boxer's protruding jugs can permit a downed rider to wiggle out from under a fallen bike without needing assistance.
John
