Fortnite - These Two Animated Emoticons Work with the Boundless Set... for now (v18.00)

Chapter 2, Season 8 introduced two new animated emoticons, "Blaargh!" and "Toon Talkin'", obtainable via the Battle Pass. However, these emoticons are not technically marked as animated, and as such can be used with the Item Shop's Boundless Set, which normally doesn't allow animated emoticons to be equipped to them. When equipped, all sixteen frames of the emoticon's animation are displayed, rather than just a single frame. All ten Boundless Outfits, as well as both Back Blings, can exploit this glitch. It is unknown whether or not Epic will patch this glitch in the near future.

First discovered by Tabor Hill.
https://www.youtube.com/watch?v=Qh0I-t0IqLU