Revealing mistake: When Mark Wahlberg removes the shrapnel from his leg, it is pretty obvious that it is a fake leg. If you look at and compare its dimensions to the rest of his body, you can see that that would be the leg of a giant man. The thigh is way too long, and the whole leg is way too big for his body. You can also tell by his body posture that his real leg goes into the couch he is sitting on.
Lone Survivor (2013)
1 revealing mistake - chronological order
Directed by: Peter Berg
Starring: Mark Wahlberg, Ben Foster, Emile Hirsch, Taylor Kitsch
Continuity mistake: In the scene where Marcus is removing the shrapnel from his leg, when he gets to the last and largest piece, he places the medallion from his necklace in his mouth to bite down on. As the scene transitions from the leg to his face as it is removed, he appears to no longer have the medallion in his mouth. Then once the shrapnel is removed, he collapses and still has the medallion in his mouth.
Shane Patton: Anything in life worth doing is worth overdoing. Moderation is for cowards.
Trivia: Marcus Luttrell named his dog DASY in memory of his team that was killed (Dietz, Axe, Southern Boy [Luttrell], and Yankee [Murphy]). DASY was shot and killed on April 1, 2009 by four men who approached Luttrell's yard. As the four men fled in their vehicle, Luttrell gave chase in his car until police intervened. Luttrell refused the 911 dispatcher's instruction to stop chasing the men.
Answer: The exact quote was "there's no medicine in a gunfight," meaning the SEALs couldn't just stop shooting at the enemy to help another SEAL who was injured. They're speaking more broadly of the "Self-aid" concept, where each person needs to look out for himself until someone else can come provide medical assistance.
Excellent answer.