@Count:
! I know that is the actual Quirk definition, but that still sounds stupidly convoluted and impossible to visualize.
! Think of it like this: Twin Impact makes it so that Nirengeki can make an attack with a strength of 5 and then, at will, make a second attack at that same point with a strength of 20. On a person, he has an unavoidable 1-2 combo (hence his name meaning "2-hit combo"), and on objects, that second attack can be used to turn things into projectiles