Complex sentence: Stunned by one of Harpoon's spears, Richard begged Tommy to give him his gun, but Tommy panicked and fled, abandoning Richard, who was soon afterwards shot by Scalphunter.
Split into simpler sentences: Stunned by one of Harpoon's spears, Richard begs Tommy to give him his gun. Tommy panicks and flees, abandoning Richard, who was soon afterwards shot by Scalphunter.