Dropping bombs has been about the only way I open up much, but I do it by e-mail, after a session. My t actually loves it because It's my only indication of trust, and we can open discussion with that next time. It makes it a little easier for me to talk if the cards are on the table, so to speak. So, I think many of us drop bombs, in one way or another, that are actually pretty useful to therapy. It's sort of an approach-avoidance thing for me.
Be well...