Anybody not knowing what 3CH is:
It's a topic generator, created by the Montreal Concept Designers at Ubisoft. [link]
It gives absolutely weird topics that are challenging to depict.
Conceptart.org has set up a 3CH of the week activity, this week the topic is:
A wet shrimp robot strikes a hard-rock musician aboard a ship
PS 7, around 1.5 hours, no ref.
edit: sorry, felt like tweaking the image a bit...