Asked you to push yourself before you're gonna go way beyond your breaking point you're gonna run until you vomit, you're gonna study until you fall asleep.
Nicola called VR 'vomity reality' because wearing a headset makes her feel sick, maybe because it's so unwieldy – difficult to move or wear because it's big and heavy.
The Dursleys had never exactly starved Harry, but he'd never been allowed to eat as much as he liked. Dudley had always taken anything that Harry really wanted, even if it made him sick.