Slow is relative. The employee in question was trying to figure out why a remote server was experiencing extreme slowdown. He ssh-ed in, but he was able to type far faster than the beleaguered remote could echo his keystrokes. So he needed to just carefully type his commands, wait for them to appear, and then press enter. Instead, he typed angrily and too quickly, swore at the connection, and eventually started slamming his keyboard in a fit of pique.

It was a totally reasonable real-world slow machine problem, and a totally useful insight into the mindset of a potential new employee.

Not egregious at all. We're developers, sometimes we have to walk into an annoying situation and deal with it like adults.