Always a very descriptive message.

The client isn't supposed to know why a 5xx happens for security reasons. If you're concerned about a 5xx then you own the server. If you own the server you check the logs. Client should never know what happened if the server encounters an error. If the client should know what happened, it should be an error on the client's fault. And that's why there are so many 4xx

@AlgoRythm makes sense. But I still wanna what went wrong so I can laugh at some silly coding error and tell them to get it together.

ah yes, a 500. The most descriptive of errors.

Usually means either you found some kind of code injection target... or the server burped.