<P> Leslie meets Ann at the pit with the rented excavator, which starts filling it in with dirt . However, they failed to realize Andy was under some tarps in the pit, and he is injured when mounds of dirt fall on him . He is taken to the hospital, where Ann is assigned as his nurse . An angry Ron (Nick Offerman) tells Leslie the town is now open to a large potential lawsuit from Andy, and he sends her to visit him along with their city attorney Scott (H. Jon Benjamin). Meanwhile, Andy is excited to be near Ann and insists it will lead to them getting back together, but Ann tells him she is very happy dating Mark, who unlike Andy has a job, apartment and future . A disheartened Andy decides he has to get money to impress Ann . When Leslie visits, he regretfully tells her he and his attorney Wendell Adams (Chris Tallman) are going to sue Pawnee . </P> <P> Leslie is convinced she can reason with Andy if they can talk without their lawyers, but Andy will not return her calls . Finally, Ann calls Andy and asks him to come to her house . Later that day, he arrives completely naked, having assumed Ann wanted to take him back . A disgusted Ann leaves the house, leaving Leslie and Andy to talk . Andy admits he is suing the town in an attempt to win Ann back, and she thinks of a different way he can impress her . The next day at city hall, Andy tells Leslie and Scott he will drop the lawsuit if they agree to fill in the pit right away . Scott agrees, unaware it was a trick between Andy and Leslie . The next day the pit is filled in and turned into a lot, and an impressed Ann waves at Andy while the construction work is going on . The episode ends with Keef riding a motorboat, revealing his role in KaBOOM! was an elaborate prank to get the playground built, and announcing he is going to build a hospital in a poor part of China . </P> <P> "Kaboom" was written by Aisha Muharrar and directed by Charles McDougall . The Pawnee pit, which has been a focal plot device in Parks and Recreation since the first episode, is filled in during this episode . "Kaboom" features actor and comedian Paul Scheer in a guest appearance as the KaBOOM! organizer . Scheer has previously worked with Aziz Ansari on the MTV sketch comedy show, Human Giant . "Kaboom" also featured H. Jon Benjamin, a voice actor from Archer, Dr. Katz, and Home Movies, as Pawnee's lawyer . Chris Pratt actually appeared naked during filming of a scene in which he arrived at Ann's house without clothes on . Michael Schur, co-creator of Parks and Recreation, said the scene was written because Pratt "loves taking his clothes off". </P> <P> The script prominently features KaBOOM!, a real - life charitable organization that builds playgrounds in locations all over the United States . Parks and Recreation included the charity in the episode as part of a charity campaign called "I Participate", sponsored by the Entertainment Industry Foundation . The campaign involves more than 60 shows on NBC ABC, CBS, Fox and several other networks, all of which spotlighted real - life charities in an effort to encourage volunteerism . Greg Daniels, the series executive producer and co-creator, was responsible for choosing the KaBOOM! charity . In an editorial featured on The Huffington Post after the "Kaboom" aired, KaBOOM! chief executive officer Darell Hammond called the episode "Ka - PERFECT!" and said, "The writers certainly captured the spirit that fuels each of our (playground) builds--something that inspires volunteers to continue their great work and strive even harder to give back to their communities ." </P>

Who played the lawyer in parks and recreation