A few years ago I bought the Blu-Ray of Master and Commander. At 17 minutes 24 seconds into the movie, there's a huge bang, clearly not a part of the movie. I never returned the disc to Amazon. I recently bought another new copy, and played it last night. Same huge bang at the same time in the movie. I've had the same bang from the first disc in Battlestar Gallactica, but otherwise no problems playing several hundred Blu-Rays. The two M&C discs have different printing as well as having different cover art on the cases. Clearly not from the same production run. What could be going on here?