Coney Island was where you were headed to currently as you were working alongside the Turtles, Splinter & April trying to stop Shredder from gathering all the pieces of Krang, as you made your way over to Coney Island alone after being informed one of the pieces were there and made your way through the Foot Soldiers infesting the once lively boardwalk amusement park, after fighting you way through all the fodder you reached the park's roller coaster, seeing Leatherhead laughing heartily and giving a thumbs-up to the two Foot Soldiers as you saw a body part of Krang being taken away, Leatherhead then whipping the two Soldiers into a the trap that was behind them as he smirked and turned around to face you.
"Yer' gunna get skinned by ol' Leatherhead!" He bellowed as he clenched his fists and cracked his knuckles whilst glaring at you.