I would say don't come up to me while I'm lifting, because I'm concentrating on my form and breathing. Distracting me at that point could actually be dangerous since I'm concentrating on lifting something heavy and you're interrupting that concentration.

Come to me after I'm done with my set and explain your concerns. Since you're trying to be helpful, I would appreciate the conversation. Plus, it would be kinda cool to actually meet David Nuno.