Sometime later, the three females were being led throughout the underground by the four brothers, who had to rely on smell and memory to figure out where April's apartment would be, at the surface. "Are you guys sure you know where you're going?", April asked them, as she and the two girls followed them across sewage water. 

"11th and Bleecker? Nope. This is only 9th street. Get it?", Michelangelo piped, after smelling the air. "Yuck", April flinched, making Jennifer shake her head with a chuckle. 
"To save your conscience, Miss O'Neil, you don't want to know", she said, before giving Charlie a hand to cross a river of water.