From TED-ED:

“We had the pleasure to create this piece for TED-ED, literally an hallucinatory experience!

Proudly made by NERDO

“What Causes Hallucinations” by TED-Ed
Educator: Elizabeth Cox
Content Producer: Gerta Xhelo
Editorial Producer: Alex Rosenthal
Narrator: Susan Zimmerman
Associate Producer: Bethany Cutmore-Scott, Elizabeth Cox

Original Sound Design by Smider”