The chances of Taff Jones meeting his Maker by falling off a ladder were so tiny because so few deaths happen that way. See the following statistics from a Daily Mirror article:
300,000,000/1 SHARK ATTACK (c 40 deaths per year)
300,000,000/1 FAIRGROUND ACCIDENT
250,000,000/1 FALLING COCONUT (c 150 deaths per year)
11,000,000/1 PLANE CRASH (c 1,300 deaths per year)
10,000,000/1 KILLED BY LIGHTNING (c 5 deaths per year)
10,000,000/1 KILLED BY THE ESCAPE OF RADIATION
9,300,000/1 DYING IN TERRORIST ATTACK
5,000,000/1 SCALDED BY HOT TAP WATER. (c 126 deaths per year)
4,400,000/1 LEFT-HANDED PEOPLE USING A RIGHT-HANDED PRODUCT
3,500,000/1 SNAKE BITES (c 25,000 deaths per year)
3,000,000/1 FOOD POISONING (c 200 deaths per year)
2,300,000/1 DYING FROM FALLING OFF A LADDER (c 15 deaths per year)
1,200 suffer serious injuries. A quarter of all falls happen off ladders.
2,000,000/1 DYING AFTER FALLING OUT OF BED (c 20 deaths)
685,000/1 DROWNING IN THE BATH (25 deaths per year)
500,000/1 BEING KILLED IN A TRAIN CRASH (c 13 deths per year)
43,500/1 BEING KILLED IN AN ACCIDENT AT WORK (c 300 deaths)
8,000/1 KILLED IN A ROAD ACCIDENT (c 1,500 per year)
5/1 DYING FROM CANCER ( c 130,000 deaths per year)
2.5/1 DYING FROM HEART ATTACK OR STROKE (c200,000 deaths per year)
http://www.mirror.co.uk/news/weird-world/2008/05/30/scientists-calculate-odd-ways-to-die-115875-17495916/