My iphone just scared the life out of me by making what I can only describe as an exploding noise! Just like a grenade going off in a computer game (ikari warriors comes to mind - yeah I'm old school). I can't for the life of me work out what it can be, none of my alerts are set to anything different than standard, I havn't jailbreaked, wasn't running any application. It happened about a week ago as well, when I was watching some youtube and I just put it down to some residual audio from that, but it seriously just did it out of the blue this time. My best guess is possible distorted version of an incoming email alert (I did have a new email) or maybe a push alert noise that I'm not aware of for some game (mini-gore / nova?). Anybody got any answers / similar experiences?