When Leo is being garrotted, he manages to grab a pair of wire cutters, cuts his noose in half, and nearly escapes.
Agatha Christie, upon learning that there is a killer in her house, tries to serve him a poisoned drink and, when that fails, whacks him over the head with a shovel a few minutes later.
Sheila makes a Molotov cocktail to distract the killer during the final standoff.