Quiz timepublished at 11:19 Greenwich Mean Time 16 January 2017
Nikki Jenkins
BBC Local Live
Thames Valley Police was trying to keep us on our toes when it tweeted this in the wee small hours...
Allow Twitter content?
This article contains content provided by Twitter. We ask for your permission before anything is loaded, as they may be using cookies and other technologies. You may want to read Twitter’s cookie policy, external and privacy policy, external before accepting. To view this content choose ‘accept and continue’.
You don't have to wait for the answer... it turned out to be a pedestrian - all in black - strolling along the A404, between Marlow and High Wycombe.
Take a closer look below...
Allow Twitter content?
This article contains content provided by Twitter. We ask for your permission before anything is loaded, as they may be using cookies and other technologies. You may want to read Twitter’s cookie policy, external and privacy policy, external before accepting. To view this content choose ‘accept and continue’.