Such an event has just happened in Australia in the run up to next month's Olympic Games in Sydney. A high school student tried to put out the torch with a fire extinguisher on as it passed through the northern New South Wales town of Maclean. He aimed it at the torch but missed, and only succeeded in spraying the runner and bystanders. The flame remaining untouched. The man was apparently trying to make a political statement about how the Olympics were now about money and not about sport.
Scientists reckon fish do get smarter if they are caught and then thrown back into the water.
Released fish become harder to catch apparently, than those who have never been reeled in.