Comp Sci professor discovers the "garbage in, garbage out" principle. Also demonstrates the common practice of running code you don't understand. An opportunity to illustrate and explain the power and pitfalls of regular expressions, squandered on a terrible example.

This innocent-looking C++ code gets through the compiler and runs for even longer than 7 minutes:

  while (1) {
      ...
  }

My car "accepts" any random liquid I can't identify poured into the gas tank, but then doesn't work.