Forget about buttons on the back of the smartphone — LG may want to make its next device bulletproof. The Korea Times reports that 20 people were injured last week during a promotional event in Korea where the company released 100 balloons in the air containing coupons offering free LG G2 smartphones. The trouble started when some aspiring G2 owners fired BB guns at the balloons to bring them down, which resulted in injuries to 20 people, some of whom were hospitalized. LG says that it’s providing proper compensation to everyone who suffered from injuries at the event. The company has also cancelled plans to hold similar events in other cities throughout Korea.