Weyerbacher Brewing asks that you destroy and remaining Oscar you might have. Fermentation in the bottle is causing pressure issues. Per the brewery:
If you purchased any bottles of Oscar and you still have not consumed them they need to be very carefully destroyed. Fermentation has occured in the bottle, which at this point is past its expiration date printed on the bottle, and excess pressure may have developed inside these bottles of old beer. There is a possibility for these bottles to explode on their own, or if handled roughly. Please handle gently, cover and wrap with a towel before picking up and dispose of safely. We realistically don’t expect there to be any of these around anymore as they are past code date, but if you have any and have any problems please contact us at the brewery.