Continuity mistake: While Clarke and Lexa are kissing, Clarke removes the neck strap of Lexa's blouse. In a subsequent shot of them kissing, the strap is back on. It disappears again as they move towards the bed.
The 100 (2014)
1 mistake in Thirteen
Starring: Eliza Taylor, Paige Turco, Marie Avgeropoulos, Thomas McDonell
Earth Skills - S1-E2
Clarke: Follow me.
Bellamy: And why would I do that?
Clarke: Because you want them to follow you. And right now they're thinking only one of us is scared.