Hah- in my experiences, yes.
Exactly aggressive and critical, combined. It's like everyone's faults are on display and they are going to be told. It's almost a weird projection of how they don't want their own faults to be the thing on their mind so they defensively focus on everyone elses.
It is not a healthy state to be in; it just creates more pain, especially if other people aren't aware of what is going on. But usually this only happens when very stressed or bothered; when something happened that moved them in such a way that they feel uncomfortable being their normal pleasant selves.
Sometimes it is because they feel they've been too pleasant and/or too repressed, so they have a period of 'letting it all hang out'... but it's not a real solution to anything. The real solution is being more open in the first place.