It's the preseason. Spurs are playing a bad team. The other guys are all youth players. Basically, nothing mattered.
Except for Christian Eriksen being cool. That always matters.
So he scored a perfect free kick because that is what he does. Even if it was in the league against a good team, the wall would have been the same, the kick would have been the same and the goalkeeper would have been just as helpless. Because Christian Eriksen is cool.
Get used to it.