Pedzisa mutsara unotevera: Nemhaka yemhando dzemitengo ine simba, mitengo yenzira imwechete inogona kusiyana zvichienderana nekupihwa uye kudiwa kwekufamba panguva iyo kukwira kunokumbirwa. Apo kufamba kunodiwa zvikuru munharaunda yakati uye pasina vatyairi vakakwana munharaunda yakadaro, mitengo yemitengo inokwira kuti vatyairi vakawanda vauye kunzvimbo iyoyo. Mune zvimwe zviitiko, izvi zvakakonzera kuwedzera kwakanyanya munguva dzekukurumidzira dzakadai seHurricane Sandy, 2014 Sydney hostage crisis, uye
Kurwiswa kweLondon Bridge muna 2017.