 Brian Yuzna (qv) was in his car once with his wife, Kathy, and  they were stopped by a gunman. Although terrified, Yuzna grabbed the  gun and started smacking the guy with it. They ended up fighting,  and Kathy started hitting the gunman with her cellphone to get him  off Brian. She said "Ive got to get a bigger cellphone," hence the  use of the line in the film, which the filmmakers felt was  representative of heroics of ordinary people.