Lost within the song and his thoughts Marek didn't really notice when someone sat their things nearby, which was odd in and of itself. Even listening to music as he was he would have caught the movements. as ti was he didn't untilt he hand came down on his shoulder, which startled Marek slightly and had him jumping a bit. He looked up and blushed as he saw it was Jack who had caught him lost in thought.
Reaching up he pulled out the earbuds, giving the man a slight sheepish smile, a bit of that sadness lingering about him. "Hi, sorry, I didn't hear you." Turning to his laptop he stopped the music player and then stashed his ear buds away, planning on giving the man his full attention.