Those are High School Lunch Tables and they're pretty hard to skate, and VERY hard to flip trick over from flat ground. I'm pretty sure that you're from an area that doesn't have those types of tables though, so it's understandable if you don't get that. Also.. the ease with which he skates them might also lead to the appearance that it's not an accomplishment but it's actually quite impressive.
Herman's part was neck and neck with Leo's part as the best part of the video in my opinion and the High School Lunch Table section was amazing.
Everyone has their own taste though, I just wanted to clarify that those tables are much harder to skate than you may think.