Like I said, I had already built up a cusion in my roll, and knew with certainty that my current game was beatable.
Knowing that a game is beatable with any certainty requires a lot of hands. By the time you've played enough hands at a level to truly know that you're beating it, you would probably be bankrolled for the next level (especially if you play with bonuses and/or rakeback).

That said, taking shots is ok in my book if you have the discipline to move back down.