While trying to make a lane change the other day, and being forced by the douchey Subaru owner in the next lane to hammer the throttle a bit harder then usual, I noticed quite a bit of black smoke rolling out of my tailpipe. Just coming out of winter here, I'm thinking I may have been blowing a little carbon out, but I've never seen this before. Any thoughts?

 

Black smoke usually indicates burning oil. Give some details on your truck such as engine, mileage, year, etc. and we can give you more help.

 

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FTR (For The Record) - black smoke typically indicates a rich fuel mixture and/or soot buildup in the exhaust system.
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2017, with a 2.7 and 56K. Has only happened this one time.

 

Blue/gray smoke is oil.
Black is too much fuel.

But you will get a good puff of black if you haven't run it hard for a while then get on it. Cleaning the cats out.

 

You should be a douchy F150 owner who gets on the throttle a little harder than usual.

Honestly, the whole part of that could have been omitted.

It could simply be that when you stomped on it, the raw unburnt fuel is what you saw in black smoke form.
Lots of vehicles exude that slightly when they mash to the floor. It's likely that your exhaust is further away, and getting further away, while viewing it from your mirror. This may be the first time you've noticed it.

 

See if it's reproducible. If it's not, what can you do?