When into the dungeon the other day to get some beer, there was glass shrapnel in ever corner of the room.
The dungeon is a 2x3.5 meter room under out mud room, concrete walls insulated ceiling and patio stone floor over gravel.
A couple of bottles had disintegrated with enough force to hurl pieces the diagonal length of the room. I could understand if this was freshly bottle suds, however the date on the bottles was 2009.03.17. The brew has been aging for about 5 months.
I succeeded in rescuing the remaining few bottles, damn that's good beer