I once played a enthusiastic Jedi Knight that the GM pitted against Aliens as a crossover. The Aliens were unbeatable and the group was permanent on the run. Finally they had us cornered and our last desperate stand resulted in the death of five PC's, we spend months to develop relationships and quirks. The last straw was a roll i missed by just one Point, that resulted (on the DM's call) in a critical failure that cut another PC in half with my Sword. Shortly after that the rest of the crew perished as well.
The first and only time i left the table in disgust never to play with him as DM again
"Space may be the Final Frontier, but it's made in a Hollywood basement"
Red Hot Chili Peppers "Californication"
"per aspera ad astra"
Seneca