Chaosmagnet looks at the doctor quizzically. "I didn't say I needed any of them." He draws a short black cylinder from one pocket. "This one runs up to seven days on low and over 900 lumens on high. In addition to using it at work I train to use it with a handgun in low light shooting situations."

The short black cylinder goes back in the pocket, and out comes a keyring from a different pocket. Chaosmagnet indicates a shorter, thinner, greyish silver cylinder hanging from the keyring. "This one is a backup. Once, during a tornado, the lights went out and my daughter started to cry. Because I had a backup flashlight with me I was able to leave her with a light so she'd be less scared, while I collected her younger sister to get her to the tornado shelter."

The keyring goes back in the pocket, and from his backpack a small oblong device is withdrawn. "This is handy for finding things in my backpack, or for leaving on in a very low mode while staying in a hotel, which I do frequently for work. It wasn't that long ago that the hotel I was staying in caught fire while I was sleeping -- this light guided me to my pants, shoes and other things so that I could get out of the hotel quickly and safely."

Chaosmagnet looks at the doctor levelly. "I don't need any of these, but I have found them quite useful. I like to be equipped appropriately for adverse events."