If Lex is so in love with Lois, why would he risk having the bomb set off at the DP while she's there? I had always thought that Lois was out of the DP when the bomb went off, arriving in time to see Jack being carried out by SM, but having re-watching this episode recently, she was clearly one of the people Clark herds to the stairwell and tells to leave. It does bring to question, whether Lex really was obsessed with Lois (romantically or due to Revenge) or if he was just trying to rid himself of a problem.
