Keith Harris and Orville to spontaneously combust at Butlins.
A super mushroom to be discovered in Brazil which cures mumps.
Breathing in pubs to be banned.
Ehhhm, some celebrity to go on a killing spree. Tom Cruise maybe.
And I think Komp is right about the weather (come back winter jacket!

). We might even get a massive volcano eruption. Ooeerrr.