Back when I played Call of Cthulhu on a semi-regular basis, some of my favorite memories was playing a reporter for the Arkham Express named Silas Marlowe. Being an astute reporter, he noticed that whenever an ancient book was discovered ... Bad Things Happened.
So he took to carrying a can of gasoline with him. Everywhere. And a cigarette lighter.
Everytime the group found books, Silas burned them, unless somebody physically stopped him.
It was a great plan until one of the group's investigations took them to a graveyard. There was a ghoul there, who happened to have discovered a cache of WWI potato masher grenades ... yeah. Suffice to say it's not a good idea to carry a can of gasoline when the undead throw grenades at you.
Alas, poor Silas. I knew ye well.
More recently ... I ran a Cthulhu adventure for the first time in awhile. Good times.
(Then again, when you've got Ken Hart, Rick Maffei, and Adrian Pommier at the table ... it's always good times.)
I'd spill more on that particular adventure, except I'm thinking of running it at GenCon this coming year, assuming I can get time off to go ... and I'd love to see Ogrepuppy at the table.
I'll warn you - just don't look too closely at the paintings on the walls ...