OP, I feel for you. Don't listen to the arse-nuggets on here talking about how much of a loser you are for letting ol' porkins obliterate you in front of all your coworkers. You're not a loser - but you did make a loser mistake.
A real champion ALWAYS pulls-up (with a pulled hammy or twisted ankle) when his/her victory is on the line. So yeah, as soon as you realized that this guy was about to walk you down, you IMMEDIATELY go down with a "pulled" hammy or something. Save face, ya know? Bonus points if you can make it look like porkins tripped you or something - then you make him look like an assshole.
This is my life philosophy. Whenever my dominance is threatened, I call foul and get my way and come out on top! It worked in HS XC and it works in the working world!