[Leo gives him a small smile, and even dares to throw his arm around Raph's shell.]

Uh-huh. This one time, Master Splinter was trying to untangle a blanket from a clothesline so he could bring it home, but then he heard a human coming, so he had to come back down the manhole. It was just a weird guy coming into the alley. [He leans a little closer, his expression turning conspiratorial.] And you know what he was even doing there?