After watching this episode again the other day, 2 things struck me as odd.
1) If the gravity from the black hole was so strong, how would this really of made the vortex on the back of the stargate actually happen? - Lets remember the wormhole is actually only disassembling atomic matter and transmitting it. It isn't actually a pipeway (Though these arguements still seem to be frequent on this board!)
2) Jack's old pal who drops into the vortex when his rope snaps. Presumably the time line is so slow while he's in the wormhole that by the time the weapon detonates he should of been transported safely to the safe planet should he not?
Answers on a postcard..