Nightmare Fodder

A Sight or Sound that could be linked to inducing nightmares in certain people. for example, a person could describe a giant spider in a movie scene as nightmare fodder, as many people suffer from Arachnophobia - which is a fear of spiders.

"Hey Pal, did you watch that Episode of Generic wildlife documentaries last night?"

"Yeah, did you see that Spider? Pure Nightmare fodder".