In the style of The Profound Programmer, I present the following:
[text: "Perhaps you should have somebody on your development team that understands how to use semaphores and other synchronization primitives", photograph reminds people that in some systems, a system failure is a lot more inconvenient than simply having to restart]
Image credit: http://www.flickr.com/photos/smithsonian/4011428942/
If you buy me beer I might even tell you how I got the inspiration for this creation. Let's just say that my inspiration came from code I looked at a long time ago.