Monday was the saddest day ever measured on Twitter, according to Hedonometer.
News of Las Vegas shootings combined with political turbulence in Europe, protests in Britain and natural events meant that sentiment dropped to an all-time low at the start of the week.
The reading was lower than the terrorist attack in Orlando last year and the bombing of Boston marathon, along with several high profile deaths.
Interestingly people were sadder about Donald Trump becoming president than Michael Jackson dying.
And the death of Osama bin Laden was also signalled as a particularly sad day.
See the results in full below:
— Chris Danforth (@ChrisDanforth) October 3, 2017