When you see a try/catch block where the catch simply throws the caught exception:

try { /*stuff*/ } catch (Exception e) { throw e }

*headdesk*

Mind blowing code style

See also: the Big Sky policy

Edit: I couldn't find a link right away, but it was the idiotic policy basically stating "just leave junk in orbit because it's a really big place and we won't need to worry about it."

Now we have millions of micrometeorites to worry about. Good job!

Better than swallowing it.

sometimes it just makes it more clear to any other devs working on the project that an exception can be thrown from the try block..