Honestly, I think its bad and you should send it to me without delay....preferably already packaged in a keg and carbonated to be enjoyed before Oktoberfest season is over
I think it is some CO2 being released from solution because of the transfer. You just have some awesome head retention going on there.
Some things to keep in mind:
The contamination risk is greatest with un-fermented wort, and decreases significantly post-fermentation. Chances are slim that it would have been contaminated at this stage of the game.
If it doesn't smell bad, and it doesn't taste bad (you tasted a sample, right?) its not bad.
Never dump on a suspicion....90% of the work/expense is already sunk into that beer...there is no reason to be hasty and dump it.