Ok, let's not get out of hand here . . . when Andrew's northern eyewall rolled over my house, I watched my cars through the kitchen window (only one not shuttered, was protected by overhang of second floor) as sustained winds of 150 mph with gusts of 200 blew through my parking lot. No cars moved; even my old slab sided '89 Jetta barely shook on her springs.
Tornados, yes, and that accounts for some heavy things moved, but debris that travels far is usually large light structures like aluminum or wood sidings, etc. Small, heavier things, like roof tiles (and yes, they can be ripped off), the 3-story apt complex across the way lost much of their roofs, and every windshield and window of every car in their parking lot was shattered, not to mention dents in the bodywork. However, we didn't get a single one in our lot, right next door. My Jetta had scratched paint and glass from the shingles of our roof, but no other damage and no car was moved an inch.
I will say this though; you know you're in trouble when the lightning is GREEN! (comes from having so much rain in the air, I think)