Dominique Luca (Kenny Johnson) often arm-wrestles to win bets or competitions for charity. In reality, Kenny Johnson was a world-class arm wrestler until he retired from competition in 1995.
S.W.A.T. units are usually called in for hostage situations or to take down heavily-armed perpetrators. The S.W.A.T. unit on this show often perform the duties of regular police officers to allow for more story lines in the series.
In Police Tactical circles, the methodology to clearing a house or room, breaks down as follows: The main entrance is designated number 1. The other sides of the house are label 2,3, 4, etc. in a clockwise manner. The corners where the sides meet are indicated by designated numbers joined by a forward slash in the middle ex: 1/2, 2/3, 3/4 etc.
This is the 3rd iteration of S.W.A.T after the original series S.W.A.T. (1975) and S.W.A.T.: Comando Especial (2003), with 3 characters common to all 3, being Daniel "Hondo" Harrelson, Jim Street and David "Deacon" Kaye. A female S.W.A.T. officer named "Chris" is also a reference to the 2003 movie.