What I have found is. As you lift the bike the jack wheels turn. Much like when you jack a car up the jack pulls itself under the car. Well the bike jack does the same thing. And because the weight is much more concentrated it makes it amplified. And if you have then removed the bags or something you have changed how the weight is after its lifter. Then when you go to sit it down the wheels dont always caster straight. It has caused me more than one or two "oh crap" as your letting it down. Letting it down is the only time I have run across scary moments. You know your trying to ease the handle off the closed position and nothing, nothing, then it seem all of a sudden it wants to go down quickly. Thats where I seem to have problems.