A loud car radio! Abdulrahman Ahmed al-Ghamdi may have been having fun. And remember: "Allah did not create man so that he could have fun. The aim of creation was for mankind to be put to the test through hardship and prayer. An Islamic regime must be serious in every field. There are no jokes in Islam. There is no humor in Islam. There is no fun in Islam. There can be no fun and joy in whatever is serious." -- Ayatollah Khomeini
Also, if he was listening to music, that is haram:
Hadith Qudsi 19:5: "The Prophet said that Allah commanded him to destroy all the musical instruments, idols, crosses and all the trappings of ignorance." (The Hadith Qudsi, or holy Hadith, are those in which Muhammad transmits the words of Allah, although those words are not in the Qur'an.)
Muhammad also said:
(1) "Allah Mighty and Majestic sent me as a guidance and mercy to believers and commanded me to do away with musical instruments, flutes, strings, crucifixes, and the affair of the pre-Islamic period of ignorance."
(2) "On the Day of Resurrection, Allah will pour molten lead into the ears of whoever sits listening to a songstress."
(3) "Song makes hypocrisy grow in the heart as water does herbage."
(4) "This community will experience the swallowing up of some people by the earth, metamorphosis of some into animals, and being rained upon with stones." Someone asked, "When will this be, O Messenger of Allah?" and he said, "When songstresses and musical instruments appear and wine is held to be lawful."
(5) "There will be peoples of my Community who will hold fornication, silk, wine, and musical instruments to be lawful ...." -- 'Umdat al-Salik r40.0
"Saudi man dies after chase by religious police for loud car radio," from Reuters, July 9:
JEDDAH, SAUDI ARABIA—A Saudi man was killed and his wife and two children were injured when their car crashed off a bridge while being pursued by religious police in the conservative Islamic kingdom, a spokesman for the religious police said on Monday.
In Saudi Arabia, a monarchy that follows a strict version of Sunni Islam, the religious police patrol the streets to enforce gender segregation and ensure the public behave in accordance with their strict Islamic teachings.
Formally known as the Commission for the Promotion of Virtue and the Prevention of Vice (CPVPV), religious police officers arrest those who do not comply with their rules. In March the commission’s head banned car pursuits, which had led to several fatal accidents.
Family members told Saudi Arabia’s al-Watan newspaper that the chase began when a CPVPV officer confronted Abdulrahman Ahmed al-Ghamdi, 35, and his family while he was returning home from an amusement park in the southern province of al-Baha. They said the loud volume of Ghamdi’s car radio prompted the confrontation.
The car sped off, police in pursuit, and crashed over a bridge, killing Ghamdi. His 9-year-old son is in a coma and his wife had her arm amputated as a result of the accident, al-Watan reported. His younger daughter, 4, was in stable condition in hospital.
Nasser al-Zahrani, a spokesman for the CPVPV in al-Baha confirmed the report. “There is a committee set up and an investigation ongoing to look into the incident,” he said....
The religious police have been trying to soften their image after gaining the reputation of being aggressive following several fatal accidents, prompting criticism at home and abroad. The decision to ban car chases was not widely accepted by all members of the religious police....