Shoppers were eager to get a tablet on sale for $49. The woman, a Walmart employee, was shopping at the time.
A video posted on YouTube shows a mob crowding the woman and police shouting at the crowd to "get back," and "everybody back off," as they tried to aid the woman.
Then, a woman is heard telling shoppers that a line is forming elsewhere for the tablets.
The store had a second display of the tablets, but shoppers had to pay for them and then would receive the tablet at a later time.
Police said the woman was not injured and was not taken to the hospital, but was taken to the back of the store.