What was your most impactful RPG session?
The one where my character used a sphere of annihilation to blow up the entire campaign world, causing it to spiral out of orbit and crash into the sun, thereby earning me a million billion XP and elevating me to the status of a god.
That was a serious impact.
Did I mention that I was playing a monk who had been polymorphed into a six-legged lammasu at the time? Or that
Why yes, yes it WAS when I was in High School. Why do you ask?