dont take this the wrong way mate but seemed a lot of faffing about,stalking that rabbit that was already aware of your presense,ok you walked it up then got down into a slight bit of dead ground but it still new you was there,all that crawling only to sit up at the end of it to take the shot which is when the bunny done the off and your dissapointment although obvious, was to me to be expected,surely stalking is about the quarry not being aware of you at all if possible,id be sticking to the fence line if it was me,just my observation mate not up for a row or anything
if you leopard crawled