I think the plastic bag strip is a Grappler Baki reference. There's a chapter where Katsumi is practicing with one just keeping it aloft with his kicks, and one of the observers reacts the same way Ran did IIRC.
See?Don't Admire...*rustle*QuickloadIt's true... Sleep-eating...*rustle*Amazin'...Chen!Ohhh...slrpslrp...slrp...You really love playing with plastic bags, don't you, Chen?shp-bam!