Nitro, somehow I missed your post until now. You commented something like not knowing how I could have problems with large body movements. Well....

I'm 6'6" tall and weigh in around 330 pounds. I don't have any small body movements. :0)

I'm pretty sure you pick up that bow or crossbow when you see the deer coming in instead of waiting until it's right in front of you. So, it comes down to preparing to take the shot. Your crossbow is already drawn and ready to fire. The bow has to be drawn before it can shoot. And if you can show me how you can draw and shoot a bow with the same amount of movement as squeezing the trigger to shoot a predrawn, precocked crossbow...