[During the 1st Zulu War (1879) in Glasgow Natal, a doctor attends to a patient whose leg is, er...missing.]
Dr. Livingstone: Well, this is nothing to worry about.
Perkins: Oh, good.
Dr. Livingstone: Eh, there's a lot of it about - probably a virus.
. . .
Perkins: So, it'll, uh... it'll just grow back again, will it?
Dr. Livingstone: Ah... I think I'd... better come clean with you about this. It's, um... it's... not a virus, I'm afraid. You see, a virus is what we doctors call "very, very small". So small, it could not possibly have made off with the whole leg. What we're looking here for is, I think - and this is no more than an educated guess, I'd like to make that clear - is some multicellular life form with stripes, huge, razor-sharp teeth about eleven foot long, and of the genus felis horribilis - what we doctors, in fact, call a tiger.
Ainsworth, Pakenham-Walsh, Perkins: [in unison] A tiger?
[Outside, the British troops and the Zulus cease fighting.]
British Troops, Zulus: A tiger?
[As the Zulus flee, the British troops collapse to the ground. Back in the medical tent...]
Pakenham-Walsh: A tiger, in Africa?
Pakenham-Walsh: A TIGER, IN AFRICA?!
Ainsworth: Ah, well, it- it has...probably escaped from a zoo.
Pakenham-Walsh: Doesn't sound very likely to me.