Taken in the 'Selous', southern Tanzania, early 1988 - formerly a 'non touristic' area, (tse tse flies I believe), the animals (as opposed to parks in Kenya and elsewhere...Masai Mara et al), were not blasé about humans....we approached this group in the jeep from downwind.......but the wind changed..oops.....and the trunks went up to check for unwelcome visitors.
Second pic (blurry because our driver was scrabbling for reverse gear, I was competing for an open window with the little African guy trying to poke his rifle out, plus I had a film camera that I couldn't focus properly)........we hit a bump, my buddy was sitting in the back on the spare tire, bounced up hit his head on the roof and landed back on the tire....testicles first...ouch).
Driver said afterwards that tuskless elephants tend to feel vulnerable, and compensate by becoming overly aggressive.