Probably late, but meet Rebecca in the Serum room and refuse to take her with you. Then you can ask her for healing up to 3 times and when Chris gets poisoned by Yawn she will bring him to the Serum room automatically, without playing as her. If you got the second floor, you either first met Rebecca in the hall with still breathing Richard and didn't bring him Serum in 7 minutes, or after the Yawn fight brought Serum to poisoned Chris in more than 4 minutes. If you do that in less than 4 minutes, Rebecca won't get into trouble at all, instead you'll have to cook V-Jolt as her in the dormitory to weaken the Plant 42.
@@dani1o25 Those strange, arbitrary things are the kind of events I miss in modern entries in Resident Evil, with the last one coming close probably being RE 3 or maybe Outbreak of all things