1) KP implements 2) Cheech and Chong, notably 3) Habitual pot smokers 4) High achievers 5) High bunch 6) High group 7) Joint committee 8) Paving crew members 9) Pit crew 10) Pitting devices 11) Pitting machines 12) Rock-throwing mob 13) Rock-throwing protesters 14) Some assailants 15) Theirs is a joint effort 1) Masons