Sorry dan mayte i have to totally disagree with what you just said.. First off I do agree with what the other dude said the tuck is a extra thing that boosts a few inches higher.. However you do need the spring in the first place. on to the power side of things... I have found that when i have done my personal best sidehops there is very little power in what I am doing, for me all about being flowing and able to flick like a mother fecker without tensing my muscles like hell. a good example is when you see people do martial arts you do not see them fight by just pulling there arm back and bashing someone its a real fast flick and bam haha I think what alot of people do is do a small hop then tuck like hell... when if you was do do a real high hop then tuck at the last second your height of sidehops will increase dramatically, if you watch videos of people like benito and all the top riders in slow mo they hop high first then tuck at the last second its not like there tucking half way up the wall kinda thing.. I know for a fact that when i put in all asmuch as i can like proper boot when i sidehop nothing happens I struggle to get my standard heights.. whereas when i flick be flowing jump up high and get my technique spot on i go alot alot higher. Take in what I say or don’t at the end of the day I have spent alot of time studying the move and learning so many different factors of it in the past and would like to put my view across because in my opinion many people have got it wrong