As part of the mandated copy protection methods, each Blu-Ray player contains 1/2 kilo of C4. If any tampering is detected, the player will self destruct, hopefully "resolving" the tamperer as well.
Unfortunately, some players have been shipped with too much C4 (for a while it was far cheaper than bubble wrap), and the results can be catastrophic.
So, don't go trying to mod your BR player. Now you know.