John E

Sounds like a nasty spill. Yes, it is normal for even high-quality rims to bend a bit under such adverse conditions. Although a cm is ALOT of lateral play, you may be able to salvage the rim. If you have not worked much with wheels, show your rim to a good local bike mechanic or a trusted, mechanically-inclined fellow cyclist, to determine whether the rim ought to be replaced. (The more abrupt the bend is, the more likely you are to have damaged the rim irreparably. One can often tune out a lazy, gradual warp or bend by judiciously adjusting the tensions/lengths of various spokes.)