BOOM!!
Rex punched the ground as the helipad spot cracked,
He wanted to put all of his strength into that punch but the last bit of sanity he had prevented him from doing so, he pulls his punch back at the last moment.
Even when Rex pulled his punch, the helipad spot still got cracked.
The cracking sound reverberated into the silent night alerting the guards that are at the entrance of the university, it probably won't be long before they reach the rooftop.
But Rex didn't care as he falls to the ground on all four,
"RAARRGHH!!!", Rex shouted venting all of his pent-up emotions.
The fight he had with Durrant shows that he's at least ready to defend himself in the Supernatural territory, even fighting against the other Undead proves his strength.
Just when he got confirmation that he indeed can walk into the Supernatural territory,