Rockfall should let you do a pass-through stunning strike - the shockwave goes right through your target - or something.
"The first time on your turn you use stunning strike, creatures in a 20' cone that includes your target must make a constitution saving throw or take martial arts die plus strength thunder damage and be pushed away from you 10 feet"
"The first time on your turn you use stunning strike, creatures in a 20' cone that includes your target must make a constitution saving throw or take martial arts die plus strength thunder damage and be pushed away from you 10 feet"