Complex sentence: Unfortunately, his work was suspended for some time, suffered an accident while crossing a bridge, the foot of the animal he was riding slipped into a hole, falling violently to the ground and breaking his leg.
Split into simpler sentences: Unfortunately, his work was suspended for some time after suffering an accident while crossing a bridge. In which, the foot of the animal he was riding slipped into a hole, causing him to fall violently to the ground and break his leg.