Back to the caricatures

Finally getting back to sketching some new caricature ideas. Here's one that's been about a year in the making. Ever since i had the idea to do a back the the future caricature, I've made numerous attempts at both Marty and doc. I don't know what it was; the lack of good reference, the surprising difficulty of caricaturing both of them, but i just couldn't do it.

Then, last week i sat down to try again on Marty and finally got something i was kinda happy with, even though it's a profile.Today i finally scanned it in and decided to add one of doc. I think it's strange how just all of a sudden i break through these blocks and am able to come up with something I'm pleased with. they're both pretty quick sketches, but i think it's got something, so i'll probably end up finishing it.

let me know what you think.