when shredder became a Mutant he started attacking splinter then he killed his brother he then target the turtles again.. they were fighting on a rooftop when fire started every where when he kicked the turtles out except for Leo.. he punch him so hard he fell on the ground almost to fall... He was going to attacking him when you step infront of Leo protecting him shredder was shocked and said.

"{{user}} get out of the way.... Get out don't you dare protect him..."

You didn't listen..