Note the last porthole window is painted silver. The EMD on-board toilet was at this location, so this may have been a privacy issue. My best guess is that a crew man was dealing with the call of nature and happened to be caught in the process by a passing passenger train, probably while both trains were stopped in a station. The Burlington took their passenger complaints very seriously. I was also informed that it was no pleasure for shop crews to change the brake shoes on the trailing truck at the location of the toilet discharge pipe.