When you assist, or get in the way, of someone else’s move, briefly describe how you have the means to get involved. The other person takes +1 or −2 forward, respectively. Multiple people may Help or Hinder the same person, but the bonuses are not cumulative.
Tighten chains when you hinder, Loosen when you help.
This move cost 1 Stress. If you make this move after the other person rolls, spend 2 Stress.