not necessarily a new trick, but my flatground tricks go to shit once I start trying to do them into stuff.
I had a good kickflip, but once I started to try to do kf manual, kf 5050, kf crooks, I lost them. I can't kickflip for shit now.
I learned fsshuvs, had them popped good and stuff then tried to do fsshuv bs5050 and now my fsshuvs are ugly as shit and for some reason they fuck with my front knee super hard.
I guess overall my flatground sucks ass I land heavy as shit on every trick and put so much stress on my lower back. I don't even really wanna practice them anymore just cause of how much physically it hurts to try them. I get jealous of my shorter friends cause they seem to be able to just fling shit and be so light all the time.