Seeing something like that, the first thing to do that might come to mind is to follow the car, Calypso was, is and will always be lazy but for some reason she decided to follow the car.
Calypso didn't rely on her 'gut feeling' cause she could mistake dire hunger for something bad happening (has happened multiple times). Following this car was a bad idea but she still decided to, either she followed it and found nothing then get peace of mind or not follow it and be forever troubled (not forever but yk what I mean).
Calypso immediately called a cab, she basically jumped in which made the car wiggle a bit, making the driver frown, 'Ugh teenagers', was displayed as a facial expression, grumpy old man.
"Follow that car", she said pointing at the red car that seemed shinier than diamonds under the sun.
The driver looked at her through the rear mirror, waiting for her to say she was joking or something, there was no time for that, "Step on it", Calpso said further.
The cab driver must hate his job even more now.