Been a while since I saw one of those gaskets but if memory serve me I believe there was a front & back side. If put in wrong and the restrictor part of the gasket broke loose over time, we know where the pieces would be sucked into. Not a good day.
"Kilgore Trout once wrote a short story which was a dialogue between two pieces of yeast. They were discussing the possible purposes of life as they ate sugar and suffocated in their own excrement. Because of their limited intelligence, they never came close to guessing that they were making champagne." - Kurt Vonnegut