Since my ds was 1 year he's now 15 months he's been having the biggest tantrums, throwing him self to the floor kicking his legs, headbutting, biting, hitting his head of anything close if he hears no... Your not alone, no helpful advice as I just take it as it comes and hope he will stop before baby no.2 comes in August!
If it makes you feel any better I seemed to experience terrible twos between 15mths and 19mths, now my 26 mth old is a lovely, sweet little chap who seems to have outgrown those stages! Long may it last!!