When Tim talks about his torque wrench, he says it measures psi. Torque wrenches measure rotational force which would be in.-lbs., in-ozs. etc.
When Tim is in the backyard looking for Mark, you can see what appears to be one of the crew standing in a doorway to the left behind Tim sitting on the slide. However, A few moments later it is revealed to be Randy that is standing in the doorway eavesdropping.