2year old tantrums

Owen can be the sweetest little boy I have ever met. More and more frequently, he is becoming a monster! These tantrums make me crazy. He is very smart, and in these periods of freak outs, he becomes a screaming, flailing, irrational, crazy person. His face contorts in such a fashion that you can't even tell its him anymore. We always ask him if Owen is still in there, not that he ever answers except for continuing to scream. I'm hoping that with time, this too shall pass.