do the math. a 3 lb glider flying at 300MPH = 900 lbs of momentum. if you want to go even further, you could crunch the numbers to find out how much weight that puts per square inch at impact and also how many G's it would produce. the numbers are staggering and there's several people on this forum that just don't get it. they could get smacked in the head with it and they still wouldn't get it. LOL.