Shaq had a hilarious reaction when his mom surprised him

Shaq was about to take a giant bite out of the topper of the birthday cake that he was given on the NBA on TNT set on Tuesday night. Then, his mom walked in.

He immediately stopped what he was doing and put the cake topper right back where it was as Isiah Thomas laughed so hard about how fast the big man straightened up - you cannot misbehave in front of your mom.

But it was amazing to see Shaq's mom hug everyone and see her son at work on his birthday. That cake looked awesome too.

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