Argon walks into a bar.
Bartender says "We don't serve Noble Gases."
Argon doesn't react.

Shrodinger gets pulled over for speeding. The cop says "Do you know how fast you were going?" Shrodinger says, "No, but I can tell you exactly where I was." The cop inspects Shrodinger's car. Finds a box. Opens it. Says, "Hey, did you know you have a dead cat back here?" Shrodinger says, "Well, he is now."

Collie walks into a bar. Bartender says, "Why the long face?"