If you throw a motorbike over the edge, and it hits someone trying to recover, it will probably kill them due to the way the bike works.
It falls fast until it hits the opponent, bounces up a little, then falls down again. However, it doesn't actually have much knockback, ensuring that it will keep hitting the opponent frequently enough to neutralize most escape tactics. The Bike large size also helps in this regard.
I dropped a bike on Pit trying to recover, it hit him as he tried to jump, then as he tried to up B, and even after he was already doomed, it hit him several more times for extra humiliation.
It falls fast until it hits the opponent, bounces up a little, then falls down again. However, it doesn't actually have much knockback, ensuring that it will keep hitting the opponent frequently enough to neutralize most escape tactics. The Bike large size also helps in this regard.
I dropped a bike on Pit trying to recover, it hit him as he tried to jump, then as he tried to up B, and even after he was already doomed, it hit him several more times for extra humiliation.