a. 失事的

v fall or come down violently

v move with, or as if with, a crashing noise

v undergo damage or destruction on impact

v move violently as through a barrier

v break violently or noisily; smash;

v occupy, usually uninvited

v make a sudden loud sound

v enter uninvited; informal

v cause to crash

v hurl or thrust violently

v undergo a sudden and severe downturn

v stop operating

v sleep in a convenient place