Near the start it shows the kitchen sink at the house of the man who was just released from prison after 23 years. The tap is dripping and the sink is nearly full. If he was away for 23 years and the sink was plugged, then the sink would have been flowing over for a long time.
Tommy Malone is occasionally wearing his vintage 1980s Sony Walkman headphones backwards in random scenes throughout (with the headband behind the earpieces instead of in front of them). As the implication seems to be that the headphones have survived decades of imprisonment with him, it should be instinctive to him which way around they are worn.