YanquiUXO, the Reddit user who originally posted this sign says that it comes from the Harvard Museum of Natural History, which hosts an annual event that allows artists to set up installations and performance art inside the museum. This is one of those pieces.
I can't find the name of the artist of this particular piece, though, so if you know, holler.
Many of the Redditors have wondered whether this piece took real-life inspiration from a lion that was famously (poorly) taxidermied for the King of Sweden in 1731. I have no idea, but the lion itself must be seen to be believed. The derp is strong with this one.
Image via Ed Yong