Piggy Not in the Middle is a mission in LEGO City Undercover: The Chase Begins.
Walkthrough[]
Chase has to retrieve pigs. The first pig is very close by. First break the crates by the lift (you'll be led right to it via your map) and then pick up the crate of fruit. Set the fruit on the green block and then pull the lever. This will trick the pig into walking on the lift. Get in your Farmer costume, hop on the pig, and then ride it back to the pen.
Now go to the second pig. There is a goon there that will stop you from taking the pig and fix the sewer pipe first. Put the pieces of the sewer pipe generator back together and then switch to the Construction Worker costume again. Mess with the box to knock the goon down with uh, well, it's straight up raw sewage.
With that taken care of, it's time to hop on the pig. Race the pig around the designated track quickly to get them off your back. Then you are free to return the pig to the pig pen.
The third pig has commandeered a tractor. Get in a vehicle and drive down to the highway. Follow the pig as he drives the tractor down the road. The pig will get into a crash outside a gas station and gets stuck in some farm equipment.
Use your Grapple Gun to yank the tire out of the equipment which will cause the pig to fly and land on the roof of the gas station. Nearby are a bunch of platforming pieces (remember, white and blue) that are just bouncing around on the pavement. Throw them onto the wall and then scale the wall. You can then get across to the roof of the gas station.
Ride the pig and jump into the back of the truckbed below. Then make your way to the final pig. He will be chilling on the roof of a house. Change to the Police Officer costume and use the Grapple Gun to get to the top of the house. Then ride the pig to the pen.[1]