Slipping the reins: Not a release, rather, simply letting the reins slide through the hands a bit. It is a very valuable tool all riders should have. To be used when the rider gets behind the motion by accident, when riding drop fences or fences with a downhill landing, or when a horse gets in trouble over a fence (such as catches a leg on a cross-country fence). Allows the rider to release the horse and give him the freedom he needs, without forcing the rider to do one of the other releases (which are inappropriate for drop fences). However, it results in extra long reins on landing, so the rider must be able to immediately gather up the reins and shorten them to the correct length.