Feb. 24, 2014 at 2:15 PM ET
Harold Ramis, who died Monday at age 69, either delivered or wrote some of the funniest, most quotable lines in movie comedy. Ramis' humor was both smart and silly, teasing viewers' brains while giving them belly laughs at the same time.
'Ghostbusters': 'Don't cross the streams'
Ramis and Dan Aykroyd wrote the original "Ghostbusters," and Ramis turned in a memorable performance as Dr. Egon Spengler, the Ghostbuster who lets the team know that crossing the energy streams of their proton packs could result in complete and total disaster.
'Stripes': 'We're not homosexuals, but we are willing to learn'
Ramis co-wrote and starred with Bill Murray in the 1981 comedy hit "Stripes." This early scene at a recruiting office lets viewers know they're not in for a typical military film. And there was no way Ramis' giant Afro was going to survive basic training.
'Knocked Up': 'Stuff happens, and you just have to deal with it'
In the 2007 Judd Apatow comedy "Knocked Up," Ramis played the father of doltish dad-to-be Ben (Seth Rogen), who tries to tell his son that fatherhood's just not that bad. (Second half of clip, brief profanity.)
SCTV: Do-it-yourself dentistry
On "SCTV," Ramis played many characters, including television dentist Mort Finkel, who recommends shots of rum instead of Novocaine and swingin' '70s tunes to dull the pain of drilling
'Ghostbusters II': 'We had part of a Slinky...'
In the sequel to "Ghostbusters," viewers learn a little more about what makes Egon Spengler so awkward and serious. Perhaps a lack of playthings as a child was part of the problem, as he explains.
'Groundhog Day': 'I'm a god'
Ramis co-wrote and directed Bill Murray's 1993 comedy "Groundhog Day," in which Murray lives the same day over and over, and tries to explain his predicament to Andie MacDowell.
'Animal House': 'I'm a zit'
Ramis helped adapt the screenplay for 1978's "Animal House," which starred his Second City pal John Belushi. Almost every scene is eminently quotable, and Belushi's physical comedy sells it in this infamous cafeteria scene.
'Caddyshack': 'Big hitter, the Lama'
Ramis directed and co-wrote the 1980 golf comedy "Caddyshack," which includes this classic tale of Bill Murray's character playing golf with the Dalai Lama. In 2001, when wrestler-turned-Minnesota-governor Jesse Ventura met with the Dalai Lama, he actually asked the spiritual leader if he'd seen the movie. (Spoiler: He hadn't. So he's got that goin' for him.)