Ravens QB Lamar Jackson posts Instagram video driving 105 mph with the seatbelt light on. Not smart for 2 reasons. One, doing it probably isn't a great idea in the first place. Two, posting it makes no sense. You're a public figure, everyone is going to see it, and what you're doing is a mixed pot of irresposible and stupid. But...for what it's worth, Lamar posted an apology -- Find the link below.

Lamar just apologized for making "a bad decision" ... and says he'll "set a better example going forward." 

TMZ.com for full details.