Just doing some more routine maintenance. I was changing the fuel filter and got distracted

and fitted it the wrong way round
Good job I noticed the direction arrow as I was doing up the pipes...
It got me thinking, this was a very easy mistake to make but what could of happened had I not of noticed could it of caused any problems down the line running etc???
Thought it was worth a mention as there must be loads of people servicing there cars ready for the shows and this could easy happen to anyone...