Indeed they could. A majority ended up in the field across the road, some 60 yards from where they started, a couple landing like knives in the ground.The speed the wind was blowing could have made those quite nasty missiles.
The front of my house is top right, the slates, came from the back roof, so the flew a long way, some also fell short, landing on the wife's VW Eos, which she's not happy about.