it is the AC adapter of the macbook (core duo, not core 2 duo) which i bought for my gf last year. it suddenly exploded right at its neck (where it connects to the laptop. the laptop is fine - although it was excessively hot when this happened. i tried to plug my mbp's magsafe in, and it also worked fine. how should i tell apple about this? the machine is 13-month old. i didnt buy apple care.