Light painting screw - backwards.
<a href="//commons.wikimedia.org/wiki/User:KKnoefler247" title="User:KKnoefler247">Karsten Loewenstein</a> (<a href="//commons.wikimedia.org/wiki/User_talk:KKnoefler247" title="User talk:KKnoefler247">talk</a><span style="white-space:nowrap"> <b>·</b></span> <a href="//commons.wikimedia.org/wiki/Special:Contributions/KKnoefler247" title="Special:Contributions/KKnoefler247">contribs</a>)
CC BY 3.0
<span class="int-own-work" lang="en">Own work</span>