Wet rain?

Walking out of the supermarket - into a spectacular downpour - I overheard a conversation between two elderly chaps & it just tickled me.

Chap 1 - Shall we wait under the porch for a while?
Chap 2 - We could do, but we could be stuck here for a while if this rain continues.
Chap 1 - Perhaps we should just head for the bus stop?
Chap 2 - We could do, but we'd get soaked - it's raining that wet rain!

Laughing to myself I dashed to my car and after unloading my trolley, clambered into the driving seat absolutely soaked to my skin.
I guess he was right - it was the wet rain after all!!