On May 21, passengers at Melbourne’s Avalon Airport faced significant delays due to a bomb scare triggered by a suspicious package. The investigation revealed the package contained a laser hair-removal device and hot chocolate, leading to the temporary shutdown of the airport. This incident underscores the importance of understanding which carry-on items can cause problems during security checks. Common trouble items include multi-tools, travel irons, and duty-free liquor, which are better stored in checked baggage to avoid complications. Prescription medications can also lead to issues, particularly in countries like the UAE, where strict regulations apply. Travelers are advised to carry medications in original packaging with a doctor’s prescription. Additionally, the rules regarding liquids, aerosols, and gels (LAGs) typically limit containers to 100 milliliters, although some airports with advanced CT scanners may allow larger quantities. Lithium batteries must be carried in hand luggage due to fire hazards, with specific limits on their wattage. Cooperation with security staff is crucial, as demonstrated by the Avalon incident, where initial non-cooperation from the passenger contributed to the prolonged airport closure.