What things does the stranger at three jolly bargemen do that trouble Pip?

* He eats with his knife. This is considered to be very bad manners in Victorian England.

* He drinks from the teapot. This is also considered to be very bad manners.

* He wipes his nose on his sleeve. This is considered to be very unhygienic.

* He talks about his criminal activities. This makes Pip very uncomfortable.

* He tries to borrow money from Pip. This makes Pip very suspicious.