I wouldn't be real comfortable driving around with a TV sitting
unattached on top of the folded down seat, but our our TV/VCR unit
wedges nicely on the floor between the front seats. We keep a book
under the front edge to angle the screen up for better viewing and to
provide circulation under the unit. The only direction it would move
in an accident--if at all--is forward, at floor level. Safety is
absolutely a valid concern.