Walt breaks out of his train of thought and looks up
"oh shoot, I'm sorry."
Walt places his utensil down to explain with his hands a bit more as he struggles to explain
"It's just commonplace to say, er, 'huit' around here. I'm just a little used to using it freely, as it doesn't carry as much meaning around here."
Walt looks blankly for awhile with a hint of concern in his eyes and and furrowed brow.