Sullivan has been asked to do a PSA, which is a Public Service Announcement! Only famous people are asked to do PSAs, so he feels pretty good about it. His subject? Fireworks on the 4th of July and dogs! You see, every Independence Day, people set off fireworks, which can upset or scare dogs or certain other pets or even people, and so you should consider carefully before you decide to set off fireworks. Have a safe and happy 4th of July, everybody!