And yet you have not given any explanation to how you know the tyres were off the ground.
Did you check for tyre marks? Did you video the event? Did you have friends standing by and watching?
I don't think my car would get airborne even if I drove over a speed bump doing 30mph(45-50 kmh). I might break the suspension, damage the tyres or wheels or scrape the bumpers. But I doubt very much I'd get airborne.
BTW You get the tingly feeling in your gut even if your tyres don't actually leave the ground.