Beth's comment about the gun being stuck in the open position strikes a memory chip.
We had just purchased a 24 foot extension wand, tested it and had it on site for the first live operation. The young fellow operating it was on the thin side to begin with and he didn't have it hooked up with the strap or belt. The wand was extended to about 18 feet and he (thought) was starting to be able to control it. After about 15 minutes of operation, several of us looked up to the sounds and then sights of the young man hollering and being twisted and twirled in circles. After our initial reaction of fright, the laughter made us unable to move for several minutes. After getting us soaked a bit, he was able to control and shut off the wand.
The wand's gun valve was broken and stuck in the open position. Without the belt, holding it in one hand made it difficult to reach for the ball valve installed just before the QD. He didn't want to throw the tool down in fear of damage. Finally he managed to reach the ball valve (without our help) and shut it off.
He commented on the muscle building potential for the wand.
After some reflection over the humorous aspects of the event, we proceeded to talk about safety procedures and the importance of the use of the belt, ball valve and how to deal with any similar future situations.
He was brave enough to go back and operate the broken wand again, but this time with the belt and another person in stand-by position for safety shut-down if needed. We all took turns to get the feel of being out of control and how to deal with this type of an emergency situation.
Safety First and Make it Last!
Regards,