New record for most dangerous ladder usage - GIF

[Toolmaker51]

and the guy holding the ladder didn't know about the emergency manual lowering valve. or how to use a nail to push in the plunger on a solenoid valve.
Then again a lot of modern equipment are made in such a way that had he known how to do that the load holding circuit would have required pressure to allow lowering. In these cases there is often a small palm pump mounted on the control bank and a procedural guide for lowering the men to the ground.

Logical features, I'm sure some means to do so are a requirement. I'm hardly familiar with aerial gear; even starting from scratch how could such features not be information on the operators placard?

[Frank S]

Logical features, I'm sure some means to do so are a requirement. I'm hardly familiar with aerial gear; even starting from scratch how could such features not be information on the operators placard?

More is the reason for my analogy I've owned scissors jacks that had a rise height of 51 ft a placard was posted in 3 places on the machine in the operator's instructions on the platform control console at the engine or motor compartment and at the lowering valve itself located in a prominent place on the machine.
I've never owned the gondola aerial boom style machine but have rented/leased them on numerous occasions the rental company always included instructional training to the persons who were going to be the designated operators. In the case once where we leased a Condor 150 the company delivered it and gave a demonstration of it's limitations or actually lack of limitations it was a 4 man platform on a boom and could be raised to 150 feet also it could be driven over rough terrain boom fully extended fully loaded with men and gear up to 1,500 lbs total across the side of a 15° slope while fully extended with the boom as low as a 15° angle and rotated through a 360° swing while under way. it has a very distinctive low fuel warning system both audible and strobe light on the platform.
I don't mind saying that the agent managed to scare the beejevers out of us rapidly switching the lower raise function while swinging the boom and driving over a curb. each person who was going to be authorized to operate it was given the full instructional treatment and a certificate showing we had received proper training and our names were included in the rental contract. I asked him if they provided parachutes he laughed but after the demonstration I was serious