On a FRA-TXL flight there was a fully-grown brown bear on board on his way to the Berlin zoological garden. Its box was placed on the lower deck and he was sedated. Yet he sometimes moved and growled. I wasn't sure if this was a hoax, but you could hear the growling quite well. The captain said several times during boarding, that people sitting in the first 10-15 rows (A300-600) shouldn't be alarmed, that there is a bear on board, sedated and locked in, nothing to worry, but some peole did look a bit uneasy. Fortunately they didn't let him out during the flight.
I know it's only VfB but I like it!