When he's happy, when the moshpit's bouncing, when there's enough of what he calls, "energy," Stormzy's got a habit he can't seem to help.
First, the UK grime MC's face lights up in a giant grin. Then he points to the crowd, his fingers cocked like a gun. Finally, he runs on the spot, like he's doing high knees at a boot camp fitness class.
Combined, it's an endearing habit that happened often during Stormzy's high octane gig at at the Logan Campbell Centre - one that bodes well for a follow-up appearance planned for New Year's festival Northern Bass.
Words like cute and endearing aren't what you'd expect to use to describe a grime gig, a genre known for explosive bass patterns and uber-aggressive MCs like Skepta and Jammer.
That's especially true for Stormzy, an MC currently at the forefront of the genre's second wave thanks to this year's excellently full-on debut Gang Signs & Prayer.