I once had a fawn come up and sniff me so close I could have slit his throat without standing up. That's when I learned not to use a food cover scent (apple) right where I was sitting.
He kept sniffing trying to find the apples, then to make matters worse he finally realized that something was amiss with this funny bush and began alarm snorting and stomping his tiny hooves. I finally had to tell him to go away, which shocked the beejeepers out of him and he ran off.