I vaguely remember using that technique to clear a Doritos-stabbed throat when I was ~10. The sponginess of bread is what makes it effective.
Maybe your esophagus but not your "throat." The last thing you want to do is cram more stuff on top of a partially blocked airway. If the object is a ways below the epiglottis then maybe, otherwise you are probably doing more harm than good.quick google says it can be used like that, to clear something stuck in your throat. but if you're choking, I can't imagine it would be a good idea