"I don't think you want to keep a lid on the excitement," Foster said. "The challenge is very much there in our face. We're jumping on the plane soon, we've only got a limited number of training sessions, so for us it's about using every opportunity we can. I don't think we want to dampen the excitement but clearly we have to make sure it doesn't become an emotional hit and we lose the clear-headed thinking we need."
The way social media lit up about Slade's injury is an indication of the suspense building in New Zealand ahead of the nation's World Cup defence and it's likely to continue until the All Blacks get on the plane for London on Thursday next week. And once they set foot on English soil it will ramp up a notch ahead of the team's first match against Argentina at Wembley on September 21 (NZT).
The team might feel they are about to step foot on a rollercoaster, but it will be ridden all the way by their supporters, that much is clear.
Loose forward Liam Messam was on light training duties, along with wing Waisake Naholo as he continues his recovery from a broken leg, and Foster had to dip into his considerable well of patience to defuse further injury rumours.
"Everyone seems to be panicking every time someone doesn't train. One guy had a cold, one guy is [getting] over a [broken] leg and another guy ... has been eased out of a session so Liam, we just follow the medical advice, he was on a light training day.
Of midfielder Williams, Foster said: "He woke up with a cold and we kept him in his room, and, no, we won't be replacing him."
The All Blacks are in World Cup mode and so is the nation.