If he explained, he'd trip over his own words. He'd mess something up, or say something wrong and then Lambert would yell again and get mad and nothing would get done. Lambert wants to drown him already (were all Lamberts so cruel?), Cole isn't going to try and chance saying something wrong again.

So, instead, Cole stares out at the other people on the beach for a moment. He could help. Helping someone while showing Lambert. Maybe that would be better than simply explaining things. And even on a lovely beach on a nice day like this, people still hurt.

"Follow me," he replies, as Cole starts to walk over towards a young woman sitting on a beach towel fifteen or so feet away, staring out into the surf.