Del:
That's right, see, so you see the old detective is nowhere near solving the mystery. You see what it is Rodney, it is not only a love story! It's a whodunnit!
Rodney:
An whodunnit? What do you mean an whodunnit?! We know who done it! The rhino done it!
Del:
Yes, I know that, we - we the audience know that, but they don't know - the actors, do they?
Rodney:
Oh, this is something else! A rhinoceros has escaped from a zoo, there are 300 dead bodies covered in rhinoceros footprints, there's a lock-up garage two and a half foot deep in rhinoceros crap, and Charlton Heston suspects the butler!
That whole scene cracks me up every single time.