Positive Surprises Also Reduce Risk-taking

People appear to decrease their risk-taking levels after experiencing any surprising outcome — even positive ones.
“Surprising events are known to cause animals to stop, freeze, orient to the surprising stimulus and update their schemas of how the world works,” Demaree said. “Our recent research suggests that surprising events also cause people to temporarily reduce risk-taking.”

via

“Animals are known to update their schemas of how the world works” (after a surprise) is an overstatement, although humans do that and are animals, so not technically wrong.