This mod changes Houston's face similiar to the one shown on the E3 2013 Stage demo of Payday 2.
Houston's face texture is changed to a texture that heavily resembles the one used in the 2013 E3 Stage demo. This texture is used for some cop models in "vanilla" Payday 2 so this face texture was probably recycled as was the PD2 Beta Karl Lakner Dallas one for pilot Bile.
Reference to Chris Shiherlis character from "The Heat" movie.
He's so, so... so.. so. so, he's sure something.