In the scene when Mac plays with the jazz band at the end of the episode,several of the other players are members of Gary Sinise's Lt.Dan Band. Sinise plays bass with the band and often tours with them to play for the US Military through the USO.
When Lindsay is shooting with the bow she closes one eye. This is not a recommended way to shoot as you will not see the target clearly. Lindsay should know this as she is trained in using guns and also mentions in other episodes that she has hunted in the past.
The type of glue used to hang posters like those depicted is typically a homemade paste made with water and flour (wheat paste) because it is easy to make and extremely inexpensive. This is, however, not what is shown.