This is one of the very best pages on the internet: Everyday social experiments with unpredicted outcomes1 minute read

So many fantastic examples of: biases, logical fallacies, behavioural psychology, heuristical biases, and behavioural economic theories turned upside down. Source: What is the most bizarre small social experiment you’ve conducted, concluding with a result which was extremely contradictory and opposite to what you originally believed would occur? – Quora