User blog comment:Fliu/Chapter 980: This Is Where the Fun Begins/@comment-72.238.4.226-20200524221121/@comment-110.141.33.135-20200525131013

Yeah it definitely due to vibrations, it's even possible Apoo is able to recho the wounds Luffy and Zoro have had previous which is why Luffy got punched and blown up and Zoro got cut.

I know people think Brook get stomped now, but there's good chance Brook's own music could counter Appp's DF, though I think Corazon's Silence Silence Fruit is the only one that could really beat Apoo's.