It actually is pretty funny, but he was never one for laughter. Perhaps Clara could get the sensation of being watched every so often in her adventures of attempted babysitting, but its all in her head. Probably. Not really.

So it might not be too much of a surprise when someone else appears next to her from nowhere, as easily missed as another ghost. There's a short 'good evening' of acknowledgment, but it can't be someone she knows. Will's generally unkempt appearance and bad attitude are a far cry from the composed person standing next to Clara now-

"Want me to throw 'em out?"

- Okay, no, it's definitely him.