So here's the full story on the baboon in Tarangire:

There is a specified lunch spot where all the park visitors eat, and each tour typically provides box lunches. At this particular site there are picnic tables set up along the edge of an a beautiful outlook from where you can see a river below and a large section of the park. The guides were just beginning to set out the white cardboard lunch boxes when I noticed that there was a rather large baboon (like the one in the picture, but not that one), sort of slowly making his way up the incline at the edge of the outlook toward our table. At this point he was still on the other side of the chest-high fence at the edge of the outlook. So I then said to the guide, "There's a baboon coming." and by the time I had finished that sentence, the baboon had suddenly sprung from gradual mode, and was on the picnic table, a distance of about 4 metres, with a lunch box in his hands. The guide, out of reflex probably more than anything, made a grab for the lunch box, and the baboon bared his very scary and large teeth with much hissing. All of us, inculding the baboon took a leap back, but the baboon maintained hold of the lunch, and quickly retreated back over the fence and back down the incline beyond the edge of the lookout. The whole incident was over in probably less than 5 seconds. I was amazed at how quickly the baboon could move. Not only that, but also the cleverness of his approach. He moved as slowly as possible as he edged up the incline so as not to be noticed, but as soon as I started to speak, it was like he recognized he had been discovered and knew he had to strike quickly. It's a good think he wasn't intent on attacking people, because I don't think anyone would have much chance against something so fast and intelligent, armed with those sharp teeth. Everyone had a good laugh after about our 'Tarangire Experience', a story which I am certain will improve with age.

A different, but similarly large baboon eating pods of the sausage tree, a natural alternative to tourist lunch boxes.