In spite of what the advertisements let you know, drones crash constantly. A superb drone will take an unplanned descent and floor interface (aka: a crash) in stride, without the need of harming the body. It will likely involve shields to protect the rotors and electronics from damage. As the https://www.aeroindustrial.com/por-que-el-dji-matrice-4t-es-el-futuro-de-las-operaciones-industriales-con-drones/