By itself the command does nothing. If given a target, you will try (unsuccessfully) to pull someone to you, or tug your own ear.
'''YANK''' ''You see'':Yank what? '''Yank <SELF>''' ''You see'': You tug on your ear. ''Others see'': <Your name> tugs on <his/her> ear. '''Yank <PERSON>''' ''You see'': Possessive, aren't we? ''Target sees'': <Your name> just tried to yank you towards <him/her>!