A live concert turned into utter havoc in Houston after a surprise appearance by Drake.
The crowd surged forward in a stampede when Drizzy was on-stage with Astroworld's founder, Travis Scott, according to the local ABC affiliate.
Houston police have reported that eight people are dead, 23 were hospitalized, and hundreds were injured, incuding a 10-year-old boy.
Chief Troy Finner told reporters his department will determine if anything criminal occurred that caused the crowd to advance so suddenly. He added that there are "rumours of people injecting some people with drugs" before the stampede.
When it became clear that a catastrophe had just unfolded, Scott and Live Nation cancelled the show at NRG Park.
There were about 50,000 in the crowd, according to the ABC affiliate.
An eyewitness in the tweet below described the scene like a "concert in hell". He saw medics going from body to body in the VIP section.
The next tweets offer up more harrowing scenes from the show.
The concert was being livestreamed on Apple Music.
From the tweet below, it appears as though a large number of fans slipped through a fence to attend the show without tickets, which would have boosted the crowd size.
Stampedes and the brain
One B.C. psychiatrist, Dr. Elisabeth Zoffman, told the Straight after the 2011 Vancouver Stanley Cup riot that during events like this, crowds are overwhelmed by emotion and act impulsively.
She has speculated that stampedes could be a result of evolutionary biology, a holdover from the past when having this capacity as a group might have been a device to ward off threats. In this regard, this behaviour is similar to the types of group behaviour demonstrated by different animal species when under threat.
She postulated that the brain's command centre, the prefrontal cortex, can cease to function properly when large numbers of people in close proximity are subjected to a "multilevel sensory bombardment".
The emotional centre within the limbic system of the brain then takes over.
“Once you’ve had your frontal lobe taken out of the equation, you’re kind of driven by your impulses and emotions,” Zoffman said back in 2011. “So the limbic system is quite capable of coordinating a lot of action—some of it not very smart.”