When I solve the 4x4 with no parity; When I get a PB; When there's a corner flip in my PB so it ends up being a DNF; When I have OLL and PLL parity in my 4x4 solve; WHEN I HAVE TO LEARN HOW TO SOLVE MEGAMINX BUT I DONT WANNA; I HATE PYRAMINX AND 3X3 EDGE POPS!!!!!!!!!!!!!!!!!!