If you don't already hate your current job, the chances are you've worked a job in the past

that you couldn't wait to see the back of.

A truly crummy job can make you feel like your dreams are being brutally crushed day by day,

but believe me, when I say it could definitely be worse.

How much worse?

Coming up are some of the most horribly tedious, gross and downright bizarre jobs you'll be glad no longer exist.

You're listening.

You're listening.

You're listening.

You're be amazed.

Let's start with the treadwheel crane operator.

The job of a crane operator isn't easy, but in centuries past it was downright terrifying.

The ancestor of the modern crane known as the Treadwheel Crane looks like a giant hamster wheel at first glance,

but it used sheer manpower to help build some of the most impressive buildings in ancient Rome and medieval Europe.

After being developed by the ever-innovative Romans, its first recorded use was in 230 BC,

and the design stood the test of time right up until the late 19th century.

But how did it work exactly?

The wheel itself had a 4 to 5 meter diameter so people, usually slaves,

could power the machine simply by walking inside it. Attached to a pulley, the crane's rope

turned onto a spindle as the wheel moved to lift the load. If the load needed to be lowered again,

the wheel could just be moved in the opposite direction. It seems simple enough, but there's no denying that operating one of these things made

for one of the worst jobs in history.

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