Josh Brolinknew about the power of hallucinogens long before he ever starred inDune.

I had a great trip!

I saw a fireplace talking to me who said some nice things.

Josh Brolin attends the photocall of “Dune” during the 78th Venice International Film Festival on September 03, 2021 in Venice, Italy

Josh Brolin in 2021.Daniele Venturelli/WireImage

I liked what he said.

I didnt dislike what he said.

Yeah, it was like, caressing.

Daniele Venturelli/WireImage

It was so good, in fact, that someone in their crew suggested a round two.

So I was in the habit of doing things again.

The second time around, however, was not nearly as fun.

That trip was not so good, Brolin admitted.

It was a lot of fire, but not the fireplace.

The ask put Brolin in between a rock and a hard place.

Do not do LSD!

Do not do LSD, children!

Turning to Kimmel, he added, It was the greatest thing I ever did.

Watch Brolin discuss his LSD trip and his mom standing up to a gorilla in the clip above.