I was wondering why at first too, then he kept going in reverse. Finally when I asked what happened, he said he lost all forward gears in his tranny. Then he went and grabbed his daughters '72 Jimmy and tried taking it in reverse through the deep hole but got stuck. But his Blazer did almost better in reverse than forward haha.
Then he got on this whole thing about reverse being funner and tried talking everyone into doing it. I told him I wouldnt though cause reverse with an SM465 would be kind of a really slow ride. But I think a couple other rigs did though.