"I'm no hero."
We know this. We've always known this. Saul also knows this. And yet, he still tries to be one. Saul is that anti-shock protection button, pressing himself firmly into hero action even if we know it's not going to work out in the end (side note: why was that even a button? Shouldn't the Discman just have always been in anti-shock mode?).
He drives out to a pay phone in the middle of nowhere, and calls the Kettlemans (three times) to warn them ("Kettlemans, you're in danger, they're coming for your money, bye").
There's actually a great Breaking Bad parallel here. In the series finale, Walt uses a similarly middle-of-nowhere pay phone in Cañoncito (a ghost town outside of Santa Fe) to call some kind of assistant to Elliott and Gretchen (Walt's best bud and co-founder of Gray Matter, and his lab assistant/former girlfriend, both of whom got rich off the company he helped found), poses as David Lynn from the New York Times , convinces the assistant to give him the Schwartz's address, surprises them in their home, and forces them to launder his millions of dollars in drug money to Flynn/Walt Jr. It's the hero/anti-shock button thing all over again.