My spookiest experience was the time Lost Halls had just come out, and I was in my first one ever. I was standing in the spawn room with ~40 other people and two guys go in the top room and drag some golems on the crowd in the spawn room and everyone gets instakilled. I shit myself when I saw all the graves and was too stunned to even press my nexus key…rip 6/8 wizzy.
Another spooky experience was when I was hosting a tomb and we were killing Geb. All I saw was 5 giant graves appear out of nowhere after 3 seconds of rubberband. I guess Geb ran over the crowd when we were all lagging.
Also this: