Moving through the crowd: The crowd is moving toward you. To move against them toward the disturbance you can make a STR check to force your way, Escape Artist to slip between, or Intimidate to get them to make way. If you can come up with something else I'll probably give it a try. If you make the DC you can move your speed as a full round action or half speed as a normal move. If you fail the DC its half of the movement depending on the action.
All PCs can act