столкнуться с затруднениями(But Roosevelt's secret plan was about to hit a snag. Но секретный план Рузвельта вот-вот должен был столкнуться с затруднениями.Sakh)
застопорилась(idiomatic) To encounter an unexpected problem or delay. Their plans to finish the garden that weekend hit a snag when an unseasonal snowfall dropped several inches on what should have become the pumpkin patch that day. – WAD Alexander Demidov)
зацепиться когтём(о птицах: A bald eagle spent Thursday night hanging upside down from the tip of a 25-metre-tall tree on Protection Island. The adult female had somehow snagged her back talon and could not get free. ART Vancouver)