So you don't want to use a sing, since if it finishes downloading, it will block the parcel while it's executing the drivers, which, depending on the size of the file and the content in it, could be an insect, a non insignificant amount of time that you're wasting running the Java script when you could be doing that after the HT most parsed and it'll run in order, which is very nice toe have now that we understand how the differ and a sink attributes work and how drama script can either block or not block the parsing of our HT Mountain.