Hilarious!
Graphics/Animation: 8.5
If you're wondering why the score is only an 8.5...I'm about to explain it. The backgrounds were absolutely spectacular...unbelievable. I can't say enough about how awesome the details of the backgrounds were. The downfall were the characters and character movements. The characters seemed really stiff at times and it took away from the finer details of the flash. You have the drawing skill, all you need to do to make this better is use it for the characters. One great thing you were able to do was shadowing on the backgrounds, it was really impressive detail there. Also, one other problem I had were the mouth movements being kindof weak at times, I understand how hard it can be to sync words, but you can definitely put more detail into some areas here.
Sound/Music: 9
The voices in this were really well done I thought, at some times there was a heavy breathing into the mic, but it was clear enough to understand, which is a huge importance to flash movies these days, so great work here. Also, the music was great for the mood, it wasn't inappropriate for your plot which is also huge points for this category. Great job here
Humor: 10
I love dirty humor, so anything like this is a winner in my book. Not only was the dirty humor entertaining, but the sheep (my favorite character) made me crack up every scene. Just because it was so funny how it was drawn, and then on top of that how it was acting when Santa was talking to Sherlock Holmes. Great humor...10/10 and I hope you bring out more flashes like this. The indirectly dirty jokes were what made this so funny.
Story: 9
I don't normally do a "story" category on grading flashes, but this one actually had a solid storyline. The whole "gift that keeps giving" is always a good way to go, especially during the holidays. There were really no flaws here, so great job with the script for the characters and the steps through Sherlock went through to finally reach a decent ending.
Originality: 10/10
Without a doubt I thought this was very original, sure it had an unoriginal theme: "the gift that keeps giving," but there were so many extras that helped give it a boost to be original. Such as the sheep and the types of things that Holmes ran into on his quest for a new Christmas tree, a lot of very unexpected humor and events.
Overall: 9/10
Overall I'd say that this was a great flash, it excelled in most of the important areas, and the only part that really needed work was some of the animation. I really love the humor, but I can't emphasize it enough in this review, so I won't go on about it. You've done some great work here, and I hope you improve enough to make a flash that hits the Top 50!