I did something today you might want to try on a train ride.
First, use your MacBook until the very last drop of your battery, while playing music on the loudest possible level. Wait until the MacBook turns into coma mode and close the MacBook during the song. It is essential that the music is still playing, when the MacBook falls asleep. Then, when you’re on the train, plug in the MacBook and wake it up from the coma mode. Then … wait.
A very interesting experience. Around 10 people around me try very hard not to ‘notice’ loud, loud music blaring out of my speakers. I get hectic, hit buttons, open and close the MacBook, look at it in distanced disbelief. I unplug it, hope the music would stop (it doesn’t, and it won’t if you try it). The MacBook very unsurprisingly doesn’t give a shit. All of this goes on for 2 minutes.
I shouldn’t have given a damn about this, it’s only (good) music after all.