Callback confusion 2

gistfile1.coffee

#I'm trying to write a wrapper function to use in place of long nested callbacks like a(b(c())).

runner = (cb, args...) ->
	puts 'run'
	cb(args...)

a = (cb, args...) ->
	puts 'a'
	cb(args...)

b = (cb, args...) ->
	puts 'b'
	cb(args...)

c = ->
	puts 'c'

#Why doesn't this work?
runner(a, b, c)