I don't know if any of this is likely. I'll let pilots take this theory apart. If we conjecture that these people live reasonably near O'Hare, since it didn't seem to take them terribly long to walk there, the planes could have either on a turn for final approach, or possibly a holding pattern (if the tower got some sort of advance hint that something was starting to happen). If the planes were turning when power failed, and these were fully fly-by-wire, the control surfaces might have locked, causing more of a spiraling crash when engines failed. ETA: I still don't think it would look like they depicted it.