Marathon Runner Bloon

The Marathon Runner Bloon has only 3 layers. Yes, that's right. Three layers. BUT, it makes the monkeys have nightmares because of its sheer speed! It is 5x the speed of a pink, and towers will often miss it. But, this bloon has a cheap weakness: road spikes. It spawns a Runner Bloon, and then the Runner Bloon spawns a Jogger Bloon.