Fans are still laughing their heads offat Fred Armisen's new "Saturday Night Live" sketch, "Farewell, Mr. Bunting," which was declared an "instant classic."

SNL isn't always "live" when you consider all of the pre-taped bits, which are often the strongest segments of the week. But millions of viewers still watch live on Saturday night, and that was the best way to see this "Dead Poets Society" spoof, because the live reactions from the studio audience and Twitter were priceless.

Check it out:

It was only a matter of time before the ceiling fans attacked. We tried to warn people...

No one saw that brilliant twist coming during the live show, and you can hear the shocked guffaws. Here are some of the reactions online:

If only SNL would do more sketches like this.

[via: EW]

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Dead Poets Society Movie Poster
Dead Poets Society
Based on 14 critics

A new English teacher, John Keating (Robin Williams), is introduced to an all-boys preparatory school... Read More

Saturday Night Live TV Show Poster
Saturday Night Live
NBCTV14October 11, 1975

An ensemble performs sketch comedy. Read More