Saw someone get busted in Walmart

I was in Walmart yesterday buying some groceries and I saw a kid of a teenager with a shopping cart full of stuff walk towards the door. You could tell he was trying to take it without paying. He walked towards the door with the shopping cart which had no bags in it. The security guard for Walmart stopped him and did a loud announcement over the speakers for other people to come. I took a video of it but I dont know if I am allowed to post it or not.