HEY:
The sign "hey" is a good way to get someone's attention when you want to sign to
them. Do NOT do this sign close to somebody's face. That would be rude.
Do it from at least several feet away. The closer you are, the smaller
the movement. The further away you are, the larger you can do the movement.
SHOULDER-TAP
You use this sign to tell someone to tap so-and-so on the shoulder so that
person will look at you so you can tell him something or ask him a question.