Can you find all 20 Batman vs Superman references in this Channel 5 weather report?

We love a challenge, but this is harder than we thought.

With the new Batman vs Superman: Dawn of Justice everyone has been getting into the spirit. We've had Memphis Depay with his Batman boots while some crafty devil made a Lego remake, and now even the Channel 5 news team are getting in on the act. Sian Welby, who presents Channel 5 weather, cunningly slipped no fewer than 20 references to the film in this 59-second clip. That's one every three seconds, so you'd think they'd be pretty easy to spot. We've watched it again and again but we're struggling to find them all. We're not the only ones either...

@Sianwelby I got 18 after 3 watches. Off to watch the film shortly

— Robbie Prouse (@RobbieProuse) 25 March 2016

17 @Sianwelby You hid them well ? — Media Shock (@MediaShockUK) 25 March 2016

https://www.youtube.com/watch?v=b1hPiJPSGgM&feature=youtu.be