The guy started hollering hurry up, I don't have all day, so I tried to get to the spot where the valve opened a little quicker. I got there to quick and threw him about 18" up in the air and hurt his back, not bad but it was sore for a few days. That happened while I was trying to move it slowly. I say this to say, BE CAREFUL. That thing could easy kill you. The long lever speeds things up to the point you could throw someone out of the bucket. Trust me I know. Ed