Following directly behind a stranger can put you and another person in a potentially hazardous situation. Should someone trip or slow down unexpectedly, you both could fall and get injured. If you want to draft during a race, running with a training partner who is aware of your pace would be a helpful technique. You can also run behind someone else, but position yourself to the side instead of directly behind. This allows you to see around someone and get out of the way if the runner slows down.