Jake's got a temper, that's for certain. His ego and his anger are getting the better of him, but things like that can happen when you find yourself responsible for the deaths of over 6,000 people, no matter how many others you may have saved in the process.
His actions in Deanna's office were inexcusable, but fortunately he's got friends who know when to come knocking (and have the good sense to bring beer and pizza).
This was a great look into the workings of a very talented but very troubled man. Nicely done.