Experiment #4, also known as Experiment Number 4, is an animatronic sold by Spirit Halloween for the 2021 Halloween season. It resembles a small crate with the two middle bars pried open. When activated, a demonic hand pops out as the interior of the crate lights up and growling can be heard.

Comes with step pad.

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Spirit Halloween's Description

They capped the fence around Essential Viral Imaging Lifescienes Inc. with three rows of razor wire, not to mention the tire spikes, barricades, armed guards, and security cameras. The other industrial park tenants thought it was overkill to ward-off corporate espionage. Then somebody found Walt, the night watchmen from next door, eviscerated on top of a pile of wooden crates smashed into pieces. Now as soon as quitting bell rings, workers are rushing to their cars while noises and sounds at Essential Viral Imaging Lifesciences have their hands shaking so bad they can barely get

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