Rudi/YMMV

Tear Jerker: Heinz making a "surprise party" for himself
True Art Is Incomprehensible: Which is why his buddy Freddy accidentally destroys one art installation, thinking it was the buffet. Also, a woman at said vernissage:

Woman: "What a great piece of art! I could look at it all the time!"
Rudi (thinking): "I don't have the heart to tell her it's just a mirror."