LOL. OK, you are right - I just read a few Mossie anecdotes and the bombs certainly weren't 'retarded'. For this unitended slur I humbly, and unreservedly, apologise to all forms of ordnance, both present and past (just in case some 'smart' bombs ever get tor read this!).
One particular mission had them dropping 4 x 500lb, with fuzes set at 11 seconds delay, at 300ft (or lower).