After videos showing that Canadian PM Justin Trudeau paused for a second before shaking US President Donald Trump's hand surfaced, a user tweeted, "Trudeau is looking at Trump's hand like he just read the Russian Dossier". "Trump: Gimme 5... Trudeau: There's no way that's 5. It's 2.5. At a push" and "Trudeau's not impressed... #TrudeauTrump" read other tweets.