-car could 'blow up'
-computer could 'blow up' a drive could crash, screen could go
-you could get a virus (both you and your computer)
-toilet could block and flood the whole house with pooh
-dishwasher/washing machine could pop a pipe and flood the house
-water main could burst leaving you with out water
-transformer box could short and leave you with out electricity
-pipe to your water tank in the loft could pop and your ceiling collapses and your house floods, the electricity shorts out blows up the computers and stoves and washing machines and dishwashers etc etc
If you give a little longer I'm sure I could come up with further catastrophes
