In the episode entitled "The Fire," as every other staff member is evacuating after hearing the fire alarm, Dwight stays behind and removes the water bottle off of the water cooler. He then splashes water around trying to extinguish the non-existent flames. After he throws the bottle into the kitchen he turns and you can notice how wet his shirt has become from the splashing water.

Another character (Kelly) has been in the restroom unaware of what is completely going on. Dwight sees her come out rushes to her immediately, picks her up and carries her a short distance before putting her down. Again, directly in front of the camera, we see Dwight still "battling the flames," only now, in a matter of a few seconds, his shirt is completely dry.