Chandler: I hate dogs.
Phoebe: Are you crazy?
Ross: Are you out of your mind?
Chandler: They are needy, they are jumpy, and you can't tell what they are thinking, and that scares me a little bit.
Ross: Right, they are scary.(He jumps up, screaming) Ahh, she just ate a treat out of my hand!!!
=> What does "She just ate a treat out of my hand!!!" mean?
I want to laught at this point,too.
It's hard to say what the joke is- is he exaggerrating the fear of the dogs, who would eat a chocloate, or something, from someone's hand?