Just some advice for shafted. I got pack a punch first since it's the most expensive and beneficial. Then I got Jug, Who's Who, double tap quick revive. I downed myself which only activates who's who so I was able to move on with three perks. Then I grabbed mule kick and went over to speed cola and downed myself again. This time I used quick revive to revive myself so I lost all perks but was easily able to get the last one before dying.