Stop in for a cup of coffee

My day started before I left for work. Saw neighbor trying to get a car out of his driveway. His GF got stuck with an Elantra. He has 2 entrances about 25 ft apart. cleared one really good and told her don't use the other. What did she do? :BangHead:. (he has a Jeep and can go either) Anyway I tell her put it in reverse and it just revs? Hmm. Ok lets just try forward. Rocked it till it jumped out of the rut. Gets it on the road and sure enough, no reverse. She drove off to work anyway. LOL She was riding on snow and ice in the center, so thinking maybe knocked something off. Don't now if there is linkage, cable or all electronic?