The Flying Motorbike by @KrisCynical (Kristin Bergh)
I don't think this one would count as a spoiler since Hagrid says he got the bike from Sirius in Sorcerer's Stone... anyway. This is Sirius on his flying motorbike. I found out from doing this pic that I hate drawing motorbikes.
HOLY !!!!! That is soooooo good! No it's not, it's EXCELLENT! I love the expression on his face. You are VERY talented to have been able to draw something like that! It's the best drawing I've ever seen. In other words, I like it a lot.