Ready Mode means whatever comes in through those doors, whether it's a multiple-car pileup, or a patient having chest pain while stuck in an elevator, or another patient with an item stuck where it shouldn't be.
This in turn means it takes longer for a local pileup to move out of a section of the road, increasing vehicle density even more, which eventually adds up to stop-and-go traffic.
And a massive pileup on the snow-covered Interstate 95 in Maine closed a 30 miles stretch of highway for 5 hours, more than 40 vehicles crashed, at least 17 people were hurt.
Others get pollen from different plant species to simulate what's happening now, as climate change causes that pileup of species blooming at the same time.