Jack, after calming down, wanted to check what was amiss with him; not only his strength increased with his leveling up, but also his perception.
He can see tiny details in a grass near him, and what was amazing was that his hearing was also boosted.
Jack realized he was now kind of a monster; Jack didn't feel like he was a human anymore in terms of his physical strength.
After taking control of his current strength, Jack stood up and went to his room. He wanted to test his strength, but he also didn't want to do suspicious activity now that the old pervert died in front of him.
Although police didn't question him, he was on the sus list. Jack didn't go out of his mansion and enjoyed the sun on the balcony, although the sun was too hot for him. After burning in the sun for 5 minutes, he went inside his room and took a cold shower.