Wasting time efficiently

Today I've been doing fun stuff! I don't have any work at my internship at the moment, so instead of just sitting around doing nothing I'm doing this at the moment:

This is a couple of sketches for my friend Jan. He asked me about two weeks ago if I was interested taking part in his upcoming project and I didn't even have to think before I said YES!
He have asked me to draw characters for this project that he'll then use as references and build up and later animate in 3D. One of my favourite things EVER in character design so this fits me perfect and its good training.