The next morning, the can had tipped over, and the turtles, even Splinter, doubled in size. Splinter washed them off of the goo as much as he could and gathered them in a coffee can, then took them to his burrow for some sleep. While the leaves and newspapers broke their fall, the canister was broken and spilled a green radioactive liquid. The canister hit and shattered a young boy's glass jar which contained four baby turtles inside and fell into the sewer. Splinter became witness to a prevented accident in which a truck released a canister which bounced in the streets unnoticed by the crowd.
It all began with Splinter, finding himself without a home for the first time after Oroku Saki aka Shredder killed his master Hamato Yoshi. While in a fight with the fearsome Krang-our heroes in a half-shell were jettisoned on a one way trip across the Multiverse. Deep below the surface, in the sewers of New York City, four turtle brothers were mutated by radioactive ooze and began training in the art of ninjutsu.