Stop Motion Paths on a Trigger

In a quiz game I created, I have trees and clouds in the background that are going by on a continuous motion path. This little game is a monkey named Bongo that is trying to get to the banana tree. He has 3 balloons and if you answer wrong you pop one. I would like to stop the trees and clouds on a trigger in the middle of their motion path. Is that possible? The reason I am struggling is because the motion paths are up to 40s long.

Things I have considered:

• Pause the timeline when Bongo reaches the banana tree. This works, but the issue with this is that it also pauses the sounds I want to come up after the clouds and trees stop(timeline pauses on base layer). 
• Set a variable once Bongo lands that stops the loop. The problem I am having here is that the loop is so long that it does not really stop when I want it to. It may keep going from anywhere from 1 to 39 seconds.
• Thinking about having it just go to the next slide, but not what I wanted to really do.

Here is the review for you to look at on Review 360.