Viper asked about a situation he had encountered where you have the opponent in your guard and he stands up, and by doing a deadlift, picks you up and dumps you hard on your back.
This is a real move, in jujutsu it is called daki age. It is a counter to a method called do jime, body choke, where the attacker holds you in a grip similar to the guard and gives you a leg version of a bear hug. This was developed in japan as people there do not possess the upper body strength of western wrestlers.
Anyway, when you pull guard the first thing you need to so is the four stages of punch defence. In stage one, you defend the head shots, in stage four he stands and you put your boots on his hips to control the range.
If you are in stage one of the guard and he progresses to kneel or stand then you need to open the guard and control the range.
If you have your legs locked and are holding his head without proper control and he begins to stand then you are neither in stage one or four so are not in control. Instead of using proper jujutsu to use the energy he gives you to your advantage, you are giving him what he needs, in this case the leglock of do jime, to perform daki age.
The lesson here is not to hang onto a technique when it has failed or the moment has passed, flow to the next technique. That's what we do the reflex drills for
