A bird who knocks before delivering its message!
The knocking always speeds up.
Someone knocking at your door for no apparent reason.
A cosh(x/a)
Something from another universe -ity!
With it's sparrowchute!
Crip Cringle.
An elf driving car
It's not about the money. It's about sending a message!
By predigree-mail.
With a woodpecker
Because the woodpecker.