Peh Boon Keng wanted to visit his estranged wife to discuss matters, but upon reaching his destination, he headed straight for the kitchen and took out a bottle of cleaning solution. The part-time cleaner then poured some into a plastic Starbucks cup and took it to the bedroom of his 20-year-old son. He then splashed the corrosive substance on his face before leaving the flat.
The solution resulted in burns around his eyes and lips. Miraculously, he was discharged a few days later with no permanent scars. The 53-year-old later claimed that his son was "moving towards him, which he interpreted as an attack", but was eventually sentenced to seven months' jail.