As cute as 'Dumbo' is, there's something unsettling about the scene where he hallucinates a parade of vaguely sinister pink elephants. Perhaps it's because it all started by someone spiking his drink.
Anyone who's had a bad fever dream knows how terrifying it is to see things that aren't really there, and poor Dumbo is traumatized by his experience, which is brought on by a tiny sip of champagne. He probably never drank again, and we can't say we blame him.