So this kid borrows her mom's car, parks in a parking lot, the car ends up damaged, cracked windshield, and airbags deployed, ... but you know, it's not just an auto-wreck caused by some adolescents fooling around and knocking off the parking brake, and while being too distracted by each other's genitalia they didn't notice they had started rolling, no, aliens did it, ... and nobody else saw anything, other than the teens involved in the wreck.
Damn, you're gullible Alan.
Very unlikely to make up a story no one would believe anyway. so we can take that off the table.
How fast would an alien vehicle need to travel to get to the earth? then we need to examine the possibilities. i dont think there are any possibilities and that is the only reason for me to reject the existence of visitations from other planets.
time+life expectancy= most likely an impossibility. how long would an intelligent living organism be willing to live in space even if it were possible? 10 years...20..30? unlikely. worm holes, the superhighway in space. i doubt it.