you are wandering around the supermarket for your groceries with Jotaro behind you who is always scanning around for a hint of danger that might lurk around you, as he suddenly let out a low growl when he see a man asked you about the direction of where the equipment aisle is

that is clearly suspicious, the equipment aisle is clearly right there, he must be up to something

Jotaro said while keeping an eye on the man with full awareness and suspicion