Okay. So I'm sat in bed watching Tv, then a strange generic "Haha" came from my phone when it was on lock screen. I was completely taken aback and scared this has never happened at first I though it was a angry birds notification, but I then realised angry birds N.C doesn't sound like that, I think I've been tapped/hacked but my phone laughed voluntarily like a human laugh and I'm pretty freaked out. So I'd appreciate any conclusions or any similar stories to what it might be. Thanks.