New England Patriot Rob Gronkowski is enormous and intimidating on the field, but maybe he's just a big kid at heart.
In Kids Foot Locker's latest ad with the Pats' tight end, Gronkowski signs a few autographs for some young fans but declines an invitation to hang out.
"Sorry, guys," he said. "I'm a grown-up. I gotta go do grown-up stuff."
The clip then jumps to him partaking in activities that are not usually characteristic of grown-ups.
