I know a guy who subbed at a concert for the bass player on short notice. Before the gig started he listened to the first song and learned its bass line. Durin

I know a guy who subbed at a concert for the bass player on short notice. Before the gig started he listened to the first song and learned its bass line. During the first song (while he was performing it) he was listening to the second song on his headphones and learning its bass line! It's utterly mind blowing what the human mind is capable of.