Even though the effects of the Insta-Grow pills developed by Muppet Labs were thought to be only temporary, this particular prune has remained in it's giant state for quite some time. Lucky us!
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Muppet Show AppearancesEdit
In The Muppet Movie, Muppet Labs is hidden in the ghost town where Kermit has his showdown with Doc Hopper. "Insta-Grow Pills" are an invention of Dr Bunsen Honeydew and Beaker, and the pills sit conveniently on the counter along with the four-foot tall Giant Prune that they've created.
Animal looks closely at the pills, takes one, and becomes Giant Animal to save the Muppets from Hopper and his hit-men.