from The Goon Show Series 8 Episode 5: The Treasure in the Tower

BLUEBOTTLE: Eccles, save me!
ECCLES: Where are you?
BLUEBOTTLE: In the water in 1957!
ECCLES: Oh, I can't help you then.
BLUEBOTTLE: Why not?
ECCLES: I'm in 1600.
BLUEBOTTLE: You can't be in there in that 1600 there! I can see you quite clearly.
ECCLES: Ah, but in 1957 you got all them good National Health spectacles.
BLUEBOTTLE: Well, you can borrow mine, and be the man sees no-one touches them, and then you can pull me up!
ECCLES: I don't know what he means... but I can't do that. I'm not really... I'm really, I'm really not here.
BLUEBOTTLE: What do you mean by that, my good man?
ECCLES: I'll tell you, my good man. If... this is 1957. You said this is 1957? Say yes.
BLUEBOTTLE: Yes.
ECCLES: Well if this is 1957, I'm dead.
BLUEBOTTLE: Then why are you standing up?
ECCLES: Um. Well, I'm not in- oh, ah! I'll tell you why I'm standing up. 'Cos I'm in 1600 and you're not born yet.
BLUEBOTTLE: Well, wait till I tell my Mum that. My Dad won't half cop it.