Yuri, who recently lost his son, took calls for a quick peace as an insult

Months of fighting on the Ukrainian front have not taken away Kostya's sense of humour -- even when it comes to the topic of Donald Trump.

Fears are high across Ukraine that the US president-elect, who claimed he would secure a ceasefire within 24 hours of coming to office, will push Kyiv into accepting peace on Russia's terms.