I was having a chat with a friend of mine who works behind a coffee machine in a cafe (she doesnt think of herself as a barista!?)
The normal thing of "wouldnt it be good if there was no soy, no decaf, babychino etc". No "I will have a large soy, decaf, half flat, white half latte, so not too much foam but not too little and its got to be hot.... but not too hot".
Then she tells me of a customer who orders this:
Half decaf, half caf, half soy, half milk. :o
A half shot of decaf, with a half shot of normal coffee, with a 50:50 mixture of soy and cow milk!
I told her she should serve her a soy decaf latte, a cafe latte, charge her for both and tell her to mix it herself (Mr Bean style!)
Anyone else asked for a wacky drink?