This isn't an art thing so much as a very minor writing thing: It feels like with these speech blocks that people are gossiping or talking about Zayn in a casual setting. That said, "It's rumored that he can conjure without even speaking" might sound more natural if you take out the word "even".
As for the paneling work itself, the weight of holding someone over you like that would likely cause the knees to be a little more bent, and the person being lifted would more likely be struggling to get their feet to the ground. The captive using their arm to try to pull away the person who is setting them on fire (I assume) would also seem more like a normal reaction (as opposed to hanging limply).