The air in the Fotohut is visibly clear when Kelso pulls up his van to it. In the next shot, Hyde opens the window and the Fotohut is now smoked up.
While Donna is sleeping over and Eric opens his bedroom door to let Hyde in, the bedroom lights go on even though he doesn't touch the switch. Similarly, the lights go out when he closes the door, but again, no one has touched the switch.
The music used in this episode was:
I Like Dreamin' (1977) by Kenny Nolan;
Undercover Angel (1977) by Alan O'Day;
It's Ecstasy When You Lay Down Next To Me (1977) by Barry White.
Forman's Spider-Man sheets designs are from the late 90s cartoon.
Hyde: So, what do I do here anyway?
Leo: Well, I don't expect a lot, man. Like, pretty much, if the hut doesn't burn down, it's been a good day. And even if it burnt down, man, it's cool, 'cause I got three or four more of these little huts somewhere.
Hyde: So where's Donna, man?
Eric: Donna? Donna? Oh! You mean that girl who spent last night in my bed?
Hyde: Yeah, yeah, that's the one.
Eric: She went home this morning.
Hyde: So? Ah? Ah? Soooo?
Eric: So let's just say she went home a very happy woman.
Eric: But I was thinking, why cuddle when we could do it?
Donna: Okay, you've been talking to those idiots in the basement again.
(in the circle)
Eric: Red won't let me get a job. He says if I don't study hard and get into college, once I turn 18, he's going to kill me... and I think he's serious, man.
Hyde: You're bummin' me out, could you just lie to me?
Eric: Uh, okay, we did it.
Hyde: Get to work!
Leo: I can't work today, man; I got an ear-ache.
Hyde: Ear-ache, my eye! Now get to work!
This is an homage to Cheech and Chong's comedy skit titled Ear-ache, My Eye from the 1979 album Up In Smoke.