Blood. Everywhere.
CM Punk was oozing from the forehead and hanging from the ropes during AEW Dynamite on Wednesday ... and it was all at the hands of his fan-turned-nemesis MJF!!
The two wrestling superstars met ahead of their big dog collar match at Revolution on Sunday ... and it was anything but civil.
For those who haven't been keeping up with the epic feud, MJF recently handed his former idol his first ever loss in AEW ... and they've traded insults back and forth ever since.
MJF had previously opened up about how he worshiped Punk as a kid and was so hurt when he quit wrestling .