>>> What is the body part doing the flicking exactly, the feet or the head or >>> the body.
See this quote from this site: http://www.classicaldressage.com/articles/regularity.html "The trot is the gait that is the least vulnerable to impurities of the rhythm. There are two main impurities that occur. The connection between the diagonal pairs can be broken, e.g. if the hind leg touches down before the diagonal front leg. This is traditionally called "rushing hindquarters" and typically shows short strides as well, i.e. the hind leg does not reach toward the center of gravity enough. The opposite case is the "rushing forehand", in which the front leg is retracted in the air and has to touch down before the diagonal hind leg. This incidentally also leads to the TOE-FLICK. The underlying cause for the TOE FLICK is tension in the horse's back. The front leg is thrown up in the air, but instead of following through and landing where the toe points, the horse pulls his front leg down and the stride is cut short. The downward acceleration of the front leg in combination with the mass inertia of the foot then provokes the toe flick." Karen Karen Thomas Wingate, NC No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.488 / Virus Database: 269.13.33/1036 - Release Date: 9/28/2007 3:40 PM
