@crucial it was a very odd one, it didnt look like he was trying to do anything, almost like he froze with indecision about what he was going to do at all, in the end he simply stood in the way and 2 heads clashed.
I have no doubt it was simply a complete mis-read of the situation, zero intent for anything at all, but 2 heads clashed, hard. So red card was always the answer, but this is where the 20-min red works.