Two songs I love but I think there's something irregular about them. Try tapping your fingers along.

Futureheads: YouTube - The Futureheads - Decent Days And Nights

Genesis: YouTube - Genesis - Turn It On Again

There's something messed up about them and I don't know what it is but I think that makes them the tracks they are.

Is there a musical term for this or am I completely wrong and these tracks are normal in every sense?