If you're having trouble establishing a mind-muscle connection with your triceps then begin the workout with something that puts the muscle into a shortened position, and work isometrics (holding the contraction) to help with that. Try a pushdown variation. My favorite for this is the reverse-grip pushdown.
Make a concerted effort to roll your knuckles back towards your body and hold that for a 2-3 count for 3-4 sets.
Thibs is a sadistic SOB because he's always glad to bring more pain your way. This time the red glow of his laser sight is dancing around your chest and he's ready to pull the trigger.