Mine was probably when a rabbit was running past my mate and he slid along the floor with his legs sticking out and the rabbit knocked its self out on his wellie, was very funny, i couldn't stop laphing.
And the other one was when I was out with the same mate, got into the last field, spotted a rabbit about 15 yds away, both dogs slipped and it ran straight towards me, got down on one knee and it went straight through my legs with jack in hot pursuit behind it and jack(beddyXGrey) caught me flush on the nose and knocked me over, dizze for about 10 minutes and had a bleeding nose, lol Funny