Superman didn't even think twice about the fact that he'd left his Daily Planet work clothes in a heap on the stockroom floor. He'd done it so many times before without incident that he'd never even considered doing anything else.
Two seconds after Superman had flown off, Lois headed over to Clark's desk to ask him a question. Clark was, as he often was, completely absent.
"Has anyone seen Clark?" Lois called out to the room at large.
"I think I saw him duck into the stockroom a second ago." Jimmy Olsen replied.
"Thanks Jimmy." Lois replied, heading into the Daily Planet's storage area.
As she searched the room for any sign of her partner, she tripped over something. That something proved to be the buckle of a belt. The buckle of a belt that was looped through a pair of empty trousers. A pair of empty trousers that was part of a pile of clothing that looked like it belonged to Clark.
"Oh my god!" Lois yelled.
"What is it?" asked Jimmy who'd presumably heard her fall and come to see if she was alright.
"Clark's naked somewhere!" Lois exclaimed, holding up the empty trousers she'd fallen over.
"Oh god!" Jimmy exclaimed. "Do you think it has anything to do with him being hit by a car yesterday? He was acting pretty strange afterwards."
"I don't know Jimmy, but either way, Clark needs help!" Lois said as she scooped up Clark's clothing.
"What in Sam Hill is going on around here?!" Perry White asked when he entered the bullpen a minute later to find Jimmy Olsen holding somebody's clothing and Lois directing the other reporters to hunt down a naked Clark Kent.
"Clark's somewhere in the building...At least I hope he's in the building...And, he's naked." Jimmy replied while one reporter called the local hospital and another called the police.
Sighing, Perry resigned himself to joining the hunt for Clark Kent who had better have a damn good explanation for all this if he wanted to keep his job.
Half an hour after the search for Clark Kent got underway, Superman flew into the window of the Daily Planet's stockroom. Realizing that he probably smelled very much like the refinery fire he'd just put out, and that something like that probably wouldn't be ignored by his coworkers, he stripped out of his suit.
The moment after he realized his clothes weren't where he remembered leaving them and a hunt for them got underway, the door to the stockroom opened and there was a yell of "I found him!"