>Be me
>Only person in my group who runs Call of Cthulhu
>Enjoy it (I'm not one of those people who bemoans being a forever GM) but like to use cons as chances to be a player
>Sign up for a game at anime con in my town
>Keeper running it says she's new to running it but has experience as player
>We're using pre-made characters from Doors to Darkness
>Keeper says if there's any items not listed on the character sheet that we want to ask and she'll approve them
>Notice there's no light source on mine (I'm playing the priest), which is something in my experience players always forget to bring
>Ask if I can have a lantern (We're playing in 1901 so no flashlights)
>Keeper agrees
>Turns out the scenario is entirely around monsters who can't enter light
>We're supposed to have a limited amount of glowing crystals which burn out to keep them back
>However, my having a lantern keeps us completely safe for 90% of the finale
>I even use the lantern flame to make jury-rigged torches for the other PCs
>About 75% through, Keeper admits she's never gotten this far without SOMEONE dying
>We all end up living, though only barely
Unintentionally breaking someone's con game was fucking hilarious. She did a great job and the fact things still remained scary is a testament to how well she handled the horror but MAN was she struggling to deal with the fact I brought a lantern.