Absolutely 100% normal 2 year old behavior!! If he was older, say 3-4 and it was "all of sudden" then no not typical. He's a grumpy testing his limits toddler. My daughter used to be a happy go lucky girl but recently has been going through this stuff too. The most important thing is for you to remain calm, get down to his level and acknowledge his feelings and try to calm him down. Does he have a lot of words for expressing himself? Can he say "i'm angry" instead of throwing that type of thing? Thats what I'm working on rigt now.
I'm not a big believer in time outs for toddlers and it sounds like when he's losing it, the last thing you should be doing is struggling to get him into a time out, it's defeating the purpose really because it's making you both more upset. Just my opinion
