Complex sentence: When Santi hears a noise and walks back upstairs and catches Jacinto messing with the safe.Santi then runs back into the cellar and Jacinto follows.Jacinto trys to threaten Santi but then accidentally hits him too hard; forcing him to slam against the wall.
Split into simpler sentences: When Santi hears a noise and walks back upstairs and catches Jacinto messing with the safe. Jacinto tries to threaten Santi but then accidentally hits him too hard; forcing him to slam against the wall.