Good for you, existentialpony! It's so rewarding to try something new with your horse and get wonderful results right away, out of patience and trust!
Since I started riding Snickers more often and working more on my position, I have, apparently, become more tense in my body, as Snickers has on occasion pigrooted, bucked and mini-reared in a protest of my tension. His back and tack are okay, already checked with the help of professionals, but he is very sensitive to overly intensive pressure or tension, so no wonder he dislikes his rider tensing up. Oh well... That's why I'm having lessons, being lunged, etc. Hopefully I'll soon get better for him again. Also, he's a very opinionated young lad and has always enjoyed a very relaxed style of pleasure riding, so starting to work on self carriage, impulsion, rhythm, and so on, makes him a little grumpy at times, although he's very responsive altogether.