You is about right slacker.
Its called a Trilifter.
It can lift a load strapped to the top, and it has a boom that extends from both ends, so it can lift from the floor as well. The rear axle assembly is also on slides, so the wheelbase can be extended for more lifting power and stability.
I believe the lifting height on the deck without the extension is around 25'.
They have the first 6' extension on to get to the crane thats at 30'. They can stack extensions to get higher, but it leaves the load further off the floor when lowered, if that makes sense.
The 4 lifting cylinders are telescopic multi stage units. Flow and pressure can be manually biased to each cylinder to compensate for slight load imbalances too.
Shes good for lifting 75,000 lbs. Got a Ferd 460 that runs on propane, so shes got ALL the hearse purrs.