Terms for subject Idiomatic containing back out

English	Russian
getting the money back is like getting blood out of a stone	невозможно получить деньги обратно (If we overpaid a phone company/utility company getting the money back is like getting blood out of a stone! ArcticFox)
put one's arm out further than one can draw it back again	зарваться (Bobrovska)
you can't back out once you've begun	взявшись за гуж, не говори, что не дюж