How do you cut angel food cake without completely squishing and deflating it? Use an Angel Food Cake Breaker!
"Patented as the Food Breaker in 1932, this multi-pronged metal and bakelite tool was the invention of an Ohio man named Cale J. Schneider. Though able to serve a variety of "food breaking" needs, it was primarily marketed as a way to slice cake without putting any undue pressure on the delicate beast; Angel Food Cakes, and their ilk, were particularly susceptible to the squash-factor." Read more at http://www.byreed.com/cakewalk/2015/6/5/the-cake-breaker.