Is it really raining?

It's a sunny day and this a great time to celebrate midsummer. Pinky and Spiky packed their things and they are ready to go. Then when they're about to go out and put their things in the car. It suddenly rained and they became sad about the weather. This resulted to rescheduling their plan.

They don't have an idea that it was not really raining. It was just their friends watering the plants.