No matter how smart and experienced you think you are, staying humble is usually a good idea. Arrogance, on the other hand, can backfire. Especially if you’re being all high and mighty in public. After all, you never know when you’re speaking to someone who may be much more knowledgeable and skilled than you. Some experts took to r/AskReddit to share stories about strangers challenging them in the fields that were their specialty, only to be shut down. We’ve collected the most interesting tales