Obvious. He already knew that... he was asking if he could smoke the nug he pulled off
Answer: Yes you can once you dry it; I would leave it to dry on a radiator placed in a metal plate so you don't rush the drying process. It might not taste its best due to it not being cured but it should all be good and you should get a nice buzz off it.
To be honest he could have gone another week or two and it would have added more weight so unfortunately that bud will stay the same and the others will increase in potency and weight. If you waited a bit longer your patience would have been rewarded a lot more than that bud.