Well I'll be a monkey's uncle. This one is real. Artist Michael Beitz is known for creating loopy, twisty, or reality-defying tables. This piece was a "rollercoaster picnic table" made for the Madison Museum of Contemporary Art in Wisconsin.

https://dornob.com/loopy-roller-coaster-ramp-connects-pair-of-picnic-tables/

https://duckduckgo.com/?t=fpas&q=Michael+Beitz+picnic+tables&ia=images&iax=images