Lol. I once got chased out of a field by a woman and her dog. She had spent thirty minutes observing me through a pair of binoculars from her kitchen doing my photography, prior to setting the "beast" on me. after legging it over the gate and on to the road, I realised in panic that I had to go back in and collect my tripod. I also got apprehended by two security guards for photographing the shop front of a Chiquitos at the Potteries Hive shopping centre because they thought I was "casing the joint" or was a potential terrorist threat?
Were you on public or private land?
Just know your rights, stand your ground and always (and I mean always!) be polite.