騎虎難下

if you ride a tiger, it's hard to get off (idiom); fig. impossible to stop halfway

down / downwards / below / lower / later / next (week etc) / second (of two parts) / to decline / to go down / to arrive at (a decision, conclusion etc) / measure word to show the frequency of an action

tiger / CL:隻|只[zhi1]

difficult (to...) / problem / difficulty / difficult / not good

disaster / distress / to scold

(Tw) saddle horse / mounted soldier

to sit astride / to ride (a horse, bike etc) / classifier for saddle horses