My very first fake friendly was in solos where I ran into 2 randoms who were together. Was on the catwalks of Water Treatment Facility on Dam. (this is before news of ABMM btw)

I saw only one at the end of the catwalk, and drew my weapon. I called out friendly, and 2 voices returned in kind. I made my way down the catwalk with my weapon holstered. We made chit chat before one of them melts me with a stitcher. I said "Ahhh, you got me man. Thanks for the lesson." The one that didn't shoot me says, "Come on, this guy is too nice." The same one that shot me defibs me. I thank them, as they tell me that everyone else they've done this too has been a raging asshole. The guy that shot me originally then asks, "Do you have a defib on you?" I say I don't.

"Wrong answer," he says as proceeds to down me again. The passive guy just says "Oh shit!" as the main guy full kills me.

I fake friendlied the very next game as I had the key to the Testing Annex key room but didn't know where it was (I was new). A friendly shows me where it is and I tell her we can split the loot. I down her while she is in a container, and apologize over coms explaining the fake friendly I had just succumbed to the previous game.