Ask any NAV developer and they can tell you exactly what an RDLC brain cramp feels like.
It is a pain behind the eyes that causes you to want to stare into space for hours, and bite the heads off innocent gummy bears. This intense pain is preceded by hours wasted searching one forum after another, searching NAV hotfix descriptions, and pillaging through standard NAV reports trying to resolve an RDLC report issue. When the pain grows so strong that you can no longer put into words the issue, you may be heard muttering things like, “Why? Why?” and “I already tried that!” and “I wonder if Wendy’s is hiring?”