Well... we bet those keyboard warriors ain't feeling so tough now, when you've got a UFC champ reading out their mean tweets.
Fair play to Rob though - he handles it like a champ.
WATCH:
Rob also took time to have a good chat with Xavier and Michelle, with the UFC fighter talking UFC 284 and the prospect of facing Paulo Costa, as well as how much harder it is raising 4 kids rather than fighting, and squashes a big rumour about his walk-on song.