I find this is a very visual sketch more than anything so I'd be interested to find out what you think of it without my strange imagination.
SCENE. INT. ELETRONICS SHOP. DAY.
A man enters the busy shop. Everyone is going about there business.
All of a sudden the power cuts out and people seem confused by the situation then the numbers 666 appear everywhere as lightening strikes outside. People begin screaming.
WOMEN - (screaming) The devils numbers! Run for your life!
The man now starts looking worried as he see's prices changing.
CUT TO: a sign for a TV set change from £499 to £666 (the man screams)
CUT TO: another sign this time for a washing machine changes from £150 to £666 (again the man screams in horror)
CUT TO: a sign for a DVD player that says £24.99 changes to £6.66.
The man stops screaming
MAN - Wow, that's cheap!
He picks up the DVD player and walks to the counter there is know one there to serve him.
People are still running in fear as the walls begin to bleed.
MAN - (tutting) Customer service has really gone down hill at Curry’s.
END.