In the original Superman, where Superman sticks the flag back on top the White House, and says "I stand for truth, justice, and the American way"; this never failed (the couple of times I saw it in the cinema as a kid) to reduce the audiences to tears of laughter (in Enlgand).
In The Blair Witch Project, where she's doing the "I'm sorry" bit in the super-big-close-up nostril shot; hilarious.
The bit in JurASSic Park where the lawyer gets eaten; the audience I was with cheered...
People living in glass paradigms shouldn't throw stones...