In disorderly fashion (5-5)
(Other definitions for pell-mell that I've seen before include "In hurried disorderly manner, headlong" , "Headling as rain may be" , "In a rushed way" , "In hurrying disorderly manner, headlong" , "Helter-skelter" .)
(Other definitions for willy-nilly that I've seen before include "Whether you like it or not" , "Regardless of wishes" , "Whether one likes it or not" , "Randomly" .)