60 year old historian Martin Bühler (who identified himself to the press, I do not identify activists without consent) appears to ‘photobomb’ a lot of media images of the G20 in Hamburg. In reality he is a long time observer documenting police brutality. In Hamburg he chose to cultivate the most non-activist ‘white bystander in a suit with a bike’ look he could manage and casually walked in front of police. As police slowed down or interrupted attacks and waited for the ‘bystander’ to get out of the way (being caught on camera trashing what look like bystanders is bad press after all), activists had time to regroup or retreat.