Still reeling from 2016? Not sure it all actually happened? Twitter has created a convenient #ThisHappened hashtag so you can confirm that you definitely didn't dream it all.  The platform's top trending topics included #Rio2016, #Euro2016, #Election2016, #Trump and, sadly, #RIP for all the very talented people the world lost this year. If you can face it, they also made this wrap-up video: