Probably something to do with boarding Economy Basic passengers in Zone 0.5 who borrowed a wheelchair to feign a disability so they have space for their six bags in the overhead bin.

Wait, maybe that's a bit too cynical....

Probably something to do with boarding screaming babies in Zone 0.5 so that they're out of earshot of Skytrax employees who happen to be in the terminal at the time.

Yeah, that's more like it.