Driving home after Thanksgiving. I did not anticipate them making a sudden lane change since there is not much traffic. Just darted into my lane quickly as they started to slow down from coasting. I was on cruise control so my speed was steady.

Sorry for the terrible audio. I actually discovered my cam's audio is terrible when I was reviewing this clip. I only had the dashcam for a few days. It made me look into the issue and I fixed it by modding my dashcam: https://www.reddit.com/r/Dashcam/comments/1p9awd4