As the lesson progressed, he wondered whatever in that box was kept 'ethical'. Could there be a creature inside? Are they being used for this lesson just for them to practice ensnaring them? Hirsch must have a brilliant plan up his sleeves. Ethical or not, both of the spells mentioned are used by wizarding folks like him to restrict movements of their targets. He supposed conjuring ropes to capture the creature would alarm them even more, causing distress and frictions as they tried to escape. Hence, hurting them in the process. Perhaps, they knew the vines were a lesser threat than ropes too. Hmm...pondering more...