He mentioned that he had sent 10 LTC from a Litecoin site and received 0.1137 bitcoin. His trading partner and him did this by using an atomic swap via a time-locked contract, which holds funds for a release if certain conditions are fulfilled.
So, The problem is if the sender can't all of the certain condition and the fund will be locked? This looks interesting to me and I just try to wait for the further announcement regarding it. Is there a whitepaper for that? This system looks very similar to the LN.