Can someone explain this hook?

So I went for a trade that I thought was good at first... https://cdn.discordapp.com/attachments/238023163789836289/285100944696279041/unknown.png https://cdn.discordapp.com/attachments/238023163789836289/285101238075523072/unknown.png https://cdn.discordapp.com/attachments/238023163789836289/285101360028844032/unknown.png https://cdn.discordapp.com/attachments/238023163789836289/285101481785425920/unknown.png https://cdn.discordapp.com/attachments/238023163789836289/285101701328011264/unknown.png https://cdn.discordapp.com/attachments/238023163789836289/285101848229052416/unknown.png

I saw Blitz move up and tried to move behind my minions. It looked like he missed and I was behind minions but he still got me?