The ol' GTR was a little squirelly this morning. "Hmm..." I think, "the rear tyre's getting a bit worn, wonder if it's that". Then the "Rear Tyre Pressure Low : 20 lbs/in2" caption pops up on the console, with an accompanying Big Red Light. Ah. That would explain it then. Fuckwit, I really should press that button more often.