Your mother(or father) called your friends' mothers and told them that you're having a barbecue at your house, and so they were all dragged over. Bill is asking his mother for a drink, Josh is waiting, very impatiently, for the burgers and hot dogs to finish being grilled, Jerry is sitting on a lawn chair, looking anxious and waiting for the time to leave, and Pete is looking for someone to talk to. You had just finished getting ready when you realized they're here before you, and so you go out to the lawn. You have an in-ground pool and a large house + yard.