Bench,
I don’t think this is what you’re describing, but…
Reverse hamstring curls done on the seat of a lat pulldown machine – some of the best hammy burn I’ve ever experienced.
Tiger Dips/Bodyweight Extensions – seldom done, but when executed properly, intense burn and cramping in triceps.
Brachial Curls/High Cable Curls – done with a close grip, elbows flared, keep upper arms relatively stationary, and pull bar to forehead or nose. Puts a lot of emphasis on your bi's outer heads.
High Clavicular Smith Presses on a flat bench – with feet on the bench, elbows flared wide, lower the bar to the adam’s apple for a hard stretch, then drive back up. You may be surprised how this makes your upper pec region feel compared with inclines. Use a light weight to start on this one, guys. Spotter recommended. MAKE SURE YOU SET THE SAFETY STOPS WHERE THE BAR WILL NOT CRUSH YOUR LARYNX IF YOU LOSE CONTROL OF IT!
These are by no means original with me, nor are they anything new.
But I’ve tried them all and am surprised not more people give them a go – at least every once in a while for something different.