Where did he learn to.....
Ok, so this underground mutant humanoid thing has lived in the London Underground for many years but has been unable to develop speech (unless copied from his victims) let alone any social etiquette yet he has learnt how to scrub up for surgery and anaesthetise people........maybe he found a book....underground dwellers and anaesthetics made easy!
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Where to now Kessler?......Ducks Breath!.