Ok.
Or he thinks it might hit the bar, and come back towards him? He probably read the situation badly, but if he'd realised where it was going, I don't think he could have got back to it in time.
Only one of them has his hand up.
That's a pretty poor analysis of what happened. When Burn jumped, he was heading towards the goal, while Button was heading away from the goal when he jumped. The second picture shows where they were once they'd landed, due to their momentum.
Sure Button could have either won the ball...