The growing popularity of electric personal vehicles has led to new challenges and an increase in accidents. This study aims to analyze risky situations among e-scooter and e-monowheel users by examining perceived, observed and measured data to gain a comprehensive understanding of safety issues. Over two months in the South region of France, the daily trips of 25 e-scooter and 5 e-monowheel drivers were recorded using smartphones, including vehicle dynamics data and video footage. The participants could report critical events in real-time. The experiment recorded 1559 trips and 115 critical events. Most interactions occurred on the road, involving motorists and pedestrians, often at intersections and during daylight. Drivers attributed responsibility as follows: 20% to themselves, 65% to others, and 15% shared, with 9% of traffic offenses reported. Causes primarily revolved around non-compliance with traffic regulations, failure to signal driving intentions, and right-of-way violations. Video and measured data accurately captured 80% of events, with 77% of them matching the declared emergency maneuvers, typically hard braking and/or avoidance. 10% of the critical events were classified as very serious and 21% as serious. Some differences emerged between e-scooter and e-monowheel users’ critical events. Similar naturalistic driving studies in Lyon and Paris will provide valuable additional data.