Far out, where Humpty fell? (3,3,4)

I believe the answer is:

off the wall

This clue is a double definition.

'far out' is the first definition.
(both can mean experimental or unusual)

'where humpty fell?' is the second definition.
(Humpty Dumpty fell off a wall)

(Other definitions for off the wall that I've seen before include "Left field" , "How Alf left (anag) -- very unconventional" , "Mad" , "Strange" , "Peeling wallpaper" .)

I've seen this clue in The Telegraph.

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