Running on music

The weather was nice and I was in need of some natural opiates. Time to go for a run. I have a fixed course I run and I always play the same music. Very energetic music, beats running in silence...
When I get home I can see from the number I'm listening to how long it took me to complete my course.

[ some calculations required, but it seems pretty accurate... ]

Running to some tunes...

And today it went extremely well, I managed to knock almost 3 minutes off my best time. Arrived home a whole song early...

[ but what am I listening to during my run..? ]