The L.A. Rams and Buffalo Bills' season opener nearly went up in smoke on Thursday ... when protesters rushed the field with a pink flare -- with one being dragged off by security.
Two women somehow found their way onto the field during the fourth quarter at SoFi Stadium ... as many in the sold-out crowd whipped their phones out to record the debacle.
Former NFL player Emmanuel Acho was one of them -- and you can see in his footage one of the two women was holding up a pink smoke bomb while racing down the field like a running back.