Where to hit a metal lizard?
1: Its back? (It is the widest area of the body. NO FUCKING WAY was its armor the smallest. Quite on the contrary. This was dumb)
2: Its belly? (Would be a really good choice, as real lizards scales are VERY THIN in their bellies, actually. It is just hard to hit there)
3: Inside its mouth? (Needs precise timing and it is riskier, but would NOT damage the metal skin AND has no metal scales to defend)
Should have been option 3 and the fact that he went with option 1 and succeeded was kind of stupid and he had enough power with that attack to hit it head on and destroy any part of the lizard's body, if it was strong enough to strike through his back, which would actually have the strongest armor.