Continuity mistake: When Herrera is swinging the fire in the trick for Nancy's birthday party, you can see Dale, Nancy and John Redcorn are at their tables sitting near the stage. In some of the following shots you can see they are further back, towards Hank and Peggy.
Continuity mistake: In the shot where Hank is using the paint roller on Bobby's wall, where he has it positioned it is around level with his head. When the shot changes to showing his face the roller has moved considerably higher out of position from his face.
Answer: Jeffrey Boomhauer is a Texas Ranger as can be seen in the final episode at the end when he sets his wallet down, it flips open revealing a Texas Ranger badge.