Any bad day for Puff Daddy is a fun day for 50 Cent.

Today was a very, very bad day for Diddy.

His ex-GF Cassie filed a $30 million lawsuit against the rap mogul.  In it, she claims Puff beat her, raped her, plied her with drugs, forced her to have sex with male hookers while he jerked off, and set Kid Cudi's car on fire in a fit of jealous rage.

That's a lot to process.  But 50 kept it simple in his inevitable Instagram post.

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A post shared by 50 Cent (@50cent)

"Damn brother love, brother love, brother love, you out here looking 👀CRAZY AS A MF. LMAO," 50 typed.

Is Diddy going down for this with 50 laughing all along the way?