Bayern Munich was playing an all attack game and wasn't even minding their defense enough because they taught probably by forcing the attack so well they were going to be able to take a lead.
Bayern will learn from this game that the build up should probably not be one sided, as much as possible, every aspect of paly should be covered especially defense so they don't concede too many goals.
To be honest Bayern Munich played very well but was very unlucky in front of the goal and the Goalkeeper from Aston Villa got was awesome in this game.
For sure or hopefully Munich will be learn from the match and making it better in the future in there next game.
But from all the games it shows that also the big Clubs like , Munich or Real Madrid can be beaten every other team even they have so much star players.
Looking forward to the next game between Dortmund against Real Madrid.