Complex sentence: On her way home, Makoto is ejected into a railroad crossing when the brakes on her bicycle fail and is hit by an oncoming train, but inadvertently finds herself transported back to the point in time when she was riding her bicycle right before the accident.
Split into simpler sentences: On her way home, Makoto is ejected into a railroad crossing when the brakes on her bicycle fail and is hit by an oncoming train. She finds herself transported back to the point in time when she was riding her bicycle right before the accident.