dumbass???
you won't afraid
that he hears you and punch you on the nose? 
Like I said, the volume was so damn loud that there was no way
he could have heard us...... and we kept our voices low. 
Seriously, if he wants to listen to music in the MRT, he should
invest in a good pair of noise-isolating earphones.
The passive ones from SonicGear are surprisingly good..... I
spent less than $30 on them, and they block out quite a lot of
external noise.