According to Rivers Cuomo in 2009:

It might be my favorite track on the album. It was an epic process coming up with it between me, [co-writer] Jermaine Dupri, and [producer] Polow Da Don – and then Lil Wayne topped it off with this rap from the edge of the grave. […] There was no sense of irony or darkness or tension in the first draft I heard from Jermaine. It was purely “whoo-hoo, let’s drink, get stoned, and get it on,” which is a fine sentiment, but I couldn’t honestly put that out and have it be the end of the story. So I ended up turning the music into something dark and beautiful and haunting, which gave it a different meaning without changing the lyrics. Lil Wayne picked up on that and developed it with his rap.

According to Rivers Cuomo in 2009:

He sounds like he’s totally insane – and not just for the sake of sounding crazy. He’s not trying to sound ghetto or gangsta or intellectual – he’s just very natural and weird.

The first time I really became aware of him was when he worked the Ninja Turtles into the song “Kush”. […] he says, “I feel like I’m racing a bunch of little turtles/Keep a bandana like the Ninja Turtles.” First of all, he rhymes “turtles” with “turtles,” which is crazy! Second, he pronounces “turtles” with this real hard “R” so he sounds super nerdy, which is something you don’t often hear from black rappers. Third, he references the Ninja Turtles! That’s another thing you don’t often hear.

[…] he really tapped into the spirit of the song, which I really struggled with at first.