Ripples
As the tsunami hits your scooter and your car, it alters the wave, creating ripples.
They're hard to see because a tsunami is pretty big, but your scooter and car do create ripples in the water as it goes past.
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Ripples come off of your scooter and car from when they were hit by a tsunami. More importantly, those things were rentals (れん), so ripples or not, it doesn't matter if they were hit by a tsunami.
As you watch the ripples come off your car and scooter, be sure to imagine the relief you'd feel if you knew they were rentals and not something owned by you.