china weird bicycle red flagREUTERS/StringerOne intern was caught spying for the Chinese.

One of the funniest ongoing threads on Quora, the wonderful question-and-answer web site, is, "What is the most catastrophic mistake made by an intern at a tech company?"

Skip directly to the confessions >

Among the people who have answered the question are former interns at Facebook, Microsoft and AIG.

Their confessions include being rude to Mark Zuckerberg's wife, burning down an office building, and accidentally turning off the internet across large stretches of the Ukraine.

Some of the respondents have used their real names. We've excerpted and anonymized the best of their answers.