Group 1 - A recent traffic accident involving a new energy vehicle that caught fire has raised public concern about emergency escape devices in cars, particularly after witnesses reported failed attempts to rescue passengers trapped inside [1] - Following the incident, there was a significant surge in the sales of window-breaking hammers, with one online store reporting an increase from about 10 sales per day to nearly 800 in just one day, marking a 70-fold increase [1] - This incident is not isolated, as major safety events often lead to a spike in sales of related safety products, such as a previous report indicating a 598% increase in window-breaking hammer sales after heavy rainfall in Beijing [4] Group 2 - The most popular product in the market is the hammer-type all-metal window-breaking tool, which combines a pointed hammer, flat hammer, and seatbelt cutter, appealing to consumers due to its straightforward design and ease of use [4] - Different types of window-breaking tools have varying methods of use; for instance, a pointed hammer can effectively break glass with a single strike, while a hammer-type tool should ideally be used to strike the corners of the glass rather than the center [4][6] - Proper techniques for using window-breaking tools include applying full upper body force and targeting the four corners of the glass for better effectiveness, as the corners are more vulnerable [6]