Because hordes of shoppers are lined up for hours outside stores, accidents are not uncommon during Black Friday. In 2008, a stampede happened at Wal-Mart in Valley Stream, NY on Black Friday, killing an employee, injuring paramedics who were trying to rescue the victim, and causing a pregnant woman to be hospitalized. So, yes, utmost care should be observed to prevent similar scenarios.
Happy shopping, everyone! Be safe!