Alonso is saying that Ralphie slowed down for him to pass and then accelerated again.
I'm sure he misinterpreted Ralf's pace, because of the gearbox problem. He may have suddenly gained momentum, when Ralf came up to the gears that were missing and went for the pass, thinking that Ralf was slowing down for him.
Ralf has been a real jackass, having problems and thinking he should decide where to be overtaken.
About Heidfeld, the curious thing is that HE WAS OVERTAKEN BY TRULLI IN THE TUNNEL, and when saw the Renault moving from the outside, slowed to give him the good line. So, concerning backmarkers, the Jordan "just" was temporarily "blind", while Schumacher was blind AND STUPID