It is mentioned earlier that Lex's people were studying the "K-field", and probably found a way to enhance the natural radiation of Kryptonite, since the bars had relatively minor effect on Superman until somehow activated.

The first 767 to crash, in May 1991, in Thailand, did so because a thrust reverser, a device meant to slow a plane on the runway, somehow activated in the sky.

The discovery adds substantial weight to a leading theory in the crash, that one or more generators, which were being carried as cargo on the flight, somehow activated and ignited the tire.

But they have assembled a circumstantial case that the oxygen generators were somehow activated and so began giving off heat and oxygen.

So he guesses that the user calling himself Hunter has somehow activated Sventek's account.

Just a machine that had somehow activated itself.

"Riker to Enterprise, "he said urgently, hoping it had somehow activated.

Trader raised his voice, not realizing that his sudden speech problem was due to post-traumatic stress that had somehow activated a genetic code that caused him to talk like a pirate.