Doesn’t look much like most elk heads that I’ve seen.
This is a doper site. Extract of amanita muscaria gives you the impression of "flying". Reindeer who eat the mushroom run around rolling their eyes and probably think they are flying.
See how the artist has used the striations in the glacially ground stone to emphasize the upward surge of the reindeer.
There'd be a guy blowing a trumpet and beating a drum in front of this one.