The word "bam" is an onomatopoeic word that represents a loud and sudden noise, often associated with something hitting or crashing into something else.
Not surprisingly, I find the troupe in excellent form on the occasion of the New York premiere of their 2015 production, Last Work, presented at BAM in early February. (brooklynrail.org)
You can learn more about the author on her website, or you can pre-order Sweet as Sin, available July 14, from BAM B & N Amazon Indiebound. (bookpage.com)