ghost hunting
Credit Flork of Cows
For those of you who do not speak French or feel like looking it up, the ghost is saying "What are you saying, I don't understand"
Thanks I guessed at my translation and got "question what are you, I don't comprehend" so I got some of the joke. Glad I was close enough
I enjoy that English has taken enough from French that if you know what some of the grammatical components are, it’s easy enough to pick up the gist of short things like this.