Perception Filter

"Right, so how do we make sure you're clothed when we can't look at you? Ah! Quick fix. This might work, but I'm going to have to modify it..." The Doctor rattled on as he plucked several bits from around the room before using his Sonic Screwdriver on them.

"Doctor?" Amy asked, covering herself.

"Right with you. Now, I just need to place this around your neck..." the eccentric man said before placing a necklace on Amy.

As soon as he turned away, Amy was clothed, as was usual.

"Doctor, what is this supposed to do?" Amy asked, holding the necklace.

She looked at it, it was a simple wire holding a small rock that looked like it could be a gem or some kind of power source. She had no idea what it was, but she left it where it was.

"Okay, activating in three, two, ONE!" The Doctor announced before using his Sonic.

Amy felt a slight uneasiness in her head, but was able to keep her balance before returning to normal. She went to reach for the necklace, but it wasn't there! She tried looking for it, but didn't see it!

"Doctor, the necklace is gone!" Amy cried.

"Amy, where did you go?!" Rory called out.

"I'm right here, dummy." Amy said, shaking his arm.

"Whoa, who just touched me?" Rory whined.

"Amy did. You just can't see her." The Doctor said.

"What?!" Amy and Rory both exclaimed.

"Amy, I gave you a perception filter. Any attempts to look at you will divert our attention away, rendering you nigh invisible. So, with no one looking at you..." the Doctor began.

"I'll be clothed! But, how will you know I'm here?" Amy interjected.

"Simple. I just need to modify your filter so that we only can look at you from the neck up. Since I can't see you, you'll have to help. Just lift the pendant on your necklace, and point my sonic at it." The Doctor said, raising his Sonic Screwdriver.

Amy held the contraption and moved it and her necklace as he instructed.

"Done. Now what?" Amy asked.

"Make sure it's pointed directly at it, then count down." he said.

"Okay, three, two, one." Amy counted

BZZZZZZZZZZZT!

The sonic whirred and it seemed like nothing happened. Amy saw Rory and the Doctor looking in her direction with wide eyes.

"Well? Did it work?" Amy asked.