They could have scored on 3rd or 4th down and used most if not all the clock that way, you can't assume the Ravens would have :50 left, unless I'm missing something here. They'd have had to use their time outs while the niner's were on offense I would think until/if the niner's scored. Unless the Ravens would have let them score untouched on 1st down, which might be their best choice had they found themselves in that situation.
and, how can we be so sure a ball is uncatchable when the reciever is held up on his route, maybe if he isn't held, it could be catchable? Just askin'.