Complex sentence: According to Splinter, something felt'off' about the man, so he followed him and witnessed a suspicious conversation between two human-disguised Kraangdroids, but the Kraang spot Splinter and attack him to keep him quiet.
Split into simpler sentences: According to Splinter, something felt'off' about the man, so he followed him and witnessed a suspicious conversation between two human-disguised Kraangdroids. The Kraang spot Splinter and attack him to keep him quiet.