He then rebooked to fly home this morning and made his way back to the Basin to watch the rest of day four, but decided last night he couldn't bypass the chance to see his son rewrite the record books.
"A bit of that and a few discussions with a couple of people,'' McCullum Snr said. "So I'm quite glad I made the decision, obviously.''
Having watched his son play on countless occasions, Stu said Brendon's innings during the past three days had its own unique place.
"Put it this way; it's the longest innings, obviously, that he's played. I've seen him play different innings. I think this innings was a combination of aggression but certainly a major part of it was concentration and dedication of what the job needed. So he's played fantastic innings at times with different results so it was special.''
McCullum Snr said he was on edge this morning as he watched his son creep towards the milestone.
"I don't normally get nervous but I was nervous around the 290s, that's for sure.''
Stu was due to fly home this evening and he will no doubt take some special memories with him.