Jerry Beagley Rope Brain Trap TiedownJerry Beagley Rope Bonnet Tie Down Bonnet Tiedown Nylon Rope Nickel Plated Hardware This Jerry Beagley Brain Trap Slides over the horses head and rests on the poll and brow. They are similar to a tiedown as the brain trap keeps a horses head from getting too elevated, but it will allow a horse to extend it's nose rather than keep it collected as a tiedown would.