I can has Calvin and Hobbes?

[ladydrace]

Can anyone here help me find a Calvin and Hobbes strip? It's one where Calvin sticks his nose into a jar (I think it's contains mustard), takes a deeeeep sniff and his head "explodes". (Not quite sure if it does or not, but the facial expression is certainly interesting...)

I need to find out what the punchline is! It bugs me that I can't remember.