get that bridle on!

How to bridle a horse: First, make sure the bridle is the right size, then hold the bit next to the horse's mouth. Put one of your hands on his muzzle, so he doesn't get nervous, then carefully slip the bit into his mouth. Put the head piece on him and strap it in. Now you've got the bridle on!
This horse's bridle has been put on. The bit is in his mouth and the head piece is strapped in well.