The Toyota Mirai hydrogen fuel cell electric vehicle has hardly been an international sales success, thanks to poor hydrogen infrastructure, expense, and polarizing design, but it proved successful to Ukrainian forces which scavenged parts from the hydrogen car to create the world’s smallest hydrogen bomb.
500 lbs is the standard size bomb that US fighter aircraft carry. Some of them can carry up to 2500 lb bombs, but lose their stealth capabilities because the bomb is outside the airframe.
So basically, really big carbomb