i don't have much in the way of interesting things to say about this...not because it doesn't have a story behind it, but because it's based on a joke that would only make sense to a handful of people. and i put 'explaining in-jokes' in the same category of hopelessness as 'describing that dream you had last night', which you realise you don't actually remember all that well the further into it you get – and 'looking through photos that you're not in' because let's be honest...you only ever look at yourself in group shots anyway...
so i've just listed the process instead:
1. roughly sketched in pencil then pen
2. traced in illustrator and evened out
3. refined and neatened
4. outlined and filled
5. last changes and effects/edited in photoshop