Noise in general mate - the pins aren't far from the kids rooms at the moment.  If they heard any indication I was playing they'd be up and I'd struggle to get them back to bed.  Rather not take the chance.

Wife was out for dinner, kids were in bed, man heaven!  Best not mess with it.

Wife was out for dinner, kids were in bed, man was out in shed playing pinball - now that's man heaven!