You'd got for coffee and he'd be jiggling about, unable to sit still - he probably greets a Sunday morning with a run - not a jog, a full blown, flat out run. He'd have to, to keep fit for TV.
Unless of course he's been typecast? Maybe he's really pissed off at his agent...
KS: "Can you please stop with all this running? I'm knackered."
Agent: "Sorry mate, that's what they want."
Poor guy! He just wants a fag and a beer on a Saturday night, and he's got to get up and run the next morning.