dexter - it's cold outside! Wally could argue that the fact he's still wearing the jacket even though he's moved all the way through the building to he boss's office, with his hands stuck deep in his pockets, is proof that he had been in the cold carpark for two hours!
One doesn't have to be that smart to come up with it, I did - and it seems to me that Wally is even smarter than me as he gets paid better to do less work than I do.
Hold on a sec. Wally is wearing a fleece jacket which means it is winter and he is feeling cold. If that is the case, why is he hanging out in the parking lot and not in the office instead? Caught you Wally!