Bruno had been standing around the corner from where Josh delivered is Bond Villain monolog before tossing Chad in an empty locker, and padlocking it. He'd heard post of the speech, and was sporting a major boner.
Josh started his lock down rounds with the laundry room. Then headed to the showers, sauna and bathroom areas before a final patrol of thr locker room. So Bruno hid in the laundry room until the lights went out, and he heard Josh locking the locker room doors.
He intended to wait maybe 10 minutes, but he was so comfy lying on the pile of freshly washed towels still warm from the dryer that he dozed off. It was after ten when Bruno went to Josh's locker. He held the lock to his ear, as he slowly turned the dial listening for the tumblers to click.
Chad was sobbing so hard that he didn't know anyone had opened the locker until Bruno lifted him out, and held him up in the faint moonlight streaming through the high overhead windows. Bruno saw Chad's face on the pouch, and 30 seconds later had removed his Speedo and was wearing Chad.