1602 - Cartman's address.
It's coming right for us! - from an incident in Colorado in which a man shot three Rocky Mountain black bears, a protected species, down from a tree. His excuse: They were coming right for us!
When Cartman begins the Tale of Scuzzlebutt Stan's arms are missing, but reappear the next time he's seen.
"Lava and You" (black and white movie) - This is a parody of 1950's nuclear safety short films. The government convinced people that if they were under attack from falling bombs they could 'duck and cover' for relative safety. "What do you do when you see the flash?" "DUCK AND COVER!" Usually, though, you would duck and cover under a table or desk. You still do this in case of earthquake, or hurricane or tornado if there's no cellar around. In case of lava flow, though, you get out of town.
"Nothing to see here" - used in the The Naked Gun movies, but it goes farther back, and shows the logical extreme of police trying to move a crowd back from a spectacular accident or disaster.
The three clocks on the wall behind the Geologist read:
NY - 11:05, SP - 9:35, LA - 8:05
Being on Mountain Time, wouldn't SP be at 9:05?
Mt. Evanston - named after Mr. Evans in Colorado.
South Park has some tough snow. When the boulder of lava lands in front of Kenny, there's neither steam nor melting snow around it.
At the end, Ned can't shoot Scuzzlebutt because he is out of ammo, but later, he drops his gun and it shoots Kenny!
Also, the lava traveled into the trench, but at some distance away from Scuzzlebutt. Thus no one in the camping party was actually in danger, as the lava that was flowing behind couldn't follow them over the ridge and so turned away and went down another route to the trench.
Lava must dry quick in cold weather. After the boys are "saved," the Mayor, then Stan (who takes the time to kill Scuzzlebutt), then Kyle, then Cartman end up on the other side of the trench again. Or did Scuzzlebutt himself hop over?
Patrick Duffy - male lead, Frank, on Step By Step, and starred in Dallas, for those who remember. He was The Man from Atlantis, as well.
In Cartman's tale Scuzzlebutt's left hand was a stalk of celery, but when he goes to personify Scuzzlebutt he holds the celery in his right hand. When Scuzzlebutt showed up to rescue the camping party, his right hand was a stalk of celery.