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I'm not entirely sure what you mean by head going straight to the ground but popping is a good idea and also when you land try and look back up and the hill at the jump. It not only looks sick but it works
if your head is going into the ground. I am going to assume it is your face. If that is the case You are getting into the back seat during your spin.
1 can you do a nice 360 with a safety grab?
2 if this is so do your 360 with your grab and instead of opening up continue to look over your shoulder and spot the jump. It shouldn't be that tough.
3 every one has a different learning curve. Stick with it as long as you aren't getting hurt eventually you will get it