Generally, Ollie made a point of tying his belt so that it stayed where he put it. In this case, he'd been rather hoping it would fly off while he was running around, so he left it rather loose. It was surprising that it was even still tied. When Kimber started tugging at it, it loosened pretty quickly.
"Oh, would you look at that?" he said with a smile before kissing her for another moment. When they parted, he continued, "I didn't tie my belt right. Now my gi's going to just--" he shrugged his shoulders, pushing the jacket away-- "fall right off."