Nick is a hole-brained druggie who spazzes out at random. Like the Johnny depp clip. I don't know what that hand grabbing spaz motion was, but one could imagine nick's neck and head doing something similar.
Also:
His fingers look totally normal here.
- We know the blue fingers are the result of lack of blood oxygen which can only come from N2O abuse.
- The magic fingers come and go depending on time of day and how deep into the stream it is.
- We have evidence of his magical hands occurring randomly late into his drinking and coke binges prior to his arrest.
- We also know has confirmed doing N2O since at least when he met April
While its 100% obvious Nick is still abusing to us, we Kiwis have a "do not touch" policy with cows. That doesn't explain people like Aaron though. If he wanted a W, he'd tell the PO to run a blood check instead of a standard urine analysis, OR to catch Nick for a urine test when his fingers turn blue on stream (as opposed to relying on him to do come to scheduled tests which gives him time to clear the nitrous from his body). Sure we'd lose a good cow with Nick in the clink, BUT at least his kids would be free from that walking atrocity.