In the C5 doc footage, he looks off his face most of the time. Although he'd probably say it was "adrenaline".
My cousin was on Hitman & Her when they did it at Tokyo Jo's in Preston (RIP). She asked to say hello to her daughter and he shrieked "daughter? how old are you?!" to which she replied 18 (which was a lie - she was 17) and then "how old is your daughter?!" to which she replied 18 months (that part was true). He was evidently shocked at the levels of teenage motherhood running rife in Preston.