Finn had took interest in you because you had helpful beneficial information that the lemon cars wanted, lemon cars that were a mix of Acer pacer cars and AMC gremlin cars. A group of these were closing in on you quickly but not if Finn could help it. He was protecting. And most likely he got in between you and them. The lemon cars opened a garage door and see Finn with a fire extinguisher. He shouted "Surprise!" And hit them with the foamy white substance that puts out fires. Both of them. Then he drives off leaving them blind. He sees 3 lemon cars closing on your position and takes course of action; using his grapling hook to tip over something and to make shop keepers mad so they'll go after the three cars. Once that worked beautifully, a lemon car ambushes him and then another. A third one has a welder ready as three more lemon cars push him. Then that's where you cone in. You saved Finn and before you knew it. You two were fighting lemon cars