He's laughing at it rather than with it.
(
Jabberwoc misses D.R. and Quinch,
Fri 17 May 2013, 15:51,
archived)
There must have been a riddle to go with it!
Keep your lightsabre handy, it might be trusty..
Tatooine makes your R2 far too dusty.
What could it possibly mean?
(
Tivert,
Tue 21 May 2013, 1:22,
archived)