Attila frontman Chris Fronzak took to Twitter on Monday to throw some shade at ex-Of Mice & Men vocalist Austin Carlile.

Read More: Austin Carlile shares thoughtful health update with fans, says he will see them this summer

As fans are aware, Carlile left Of Mice & Men in 2016, reportedly due to both health concerns and creative issues.

On Sunday, OM&M released "Unbreakable," their first single without Carlile.

Well, Fronz (or "Fronzilla") seized that confluence of events to play the part of a blissfully unaware Twitter troll, sarcastically congratulating Carlile on the new Of Mice & Men song via the social media service.

Prior to Fronz's troll tweet, he did offer high praise for "Unbreakable" and OM&M's remaining vocalist, Aaron Pauley.

Watch out for that Twitter shade, folks.

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