Hi, I have the similar experience as you. I am Chinese student and justgraduated from School, and currently using my OPT working in a company in U.S. I have a business trip to Mexico. You had the experience of getting VISA in Mexico during you OPT period. So could you tell me more experience about that? Is that risky? I really worry about the VISA issue. If I get rejection when I come back U.S, I have nowhere to go. You can reach me at cfechan@gmail.com or my cell 6122324540. Thank you so much.