That's probably a good thing. Robert, on the other hand, remembers it still very clearly, from starting the blaze to pulling the alarm to first ordering the microbots to shield him- and then, after it became an inferno, making his escape.

It wasn't as though he'd any family who would mourn him at that point. Tadashi, on the other hand...

He's not going to a keep along the subject. Instead, he's going to try and use this opportunity.

"I meant to ask," he says, stepping again - but this time, so that he's half-facing Tadashi, hands in his coat pockets. "What do you remember about waking up...?"