I went.

Got to the gym, was on the treadmill for 34 minutes, running for 3, walking for two, ran for 4, walked for 2. Intervals. Got nice and sweaty. Then, I went downstairs and saw two empty squat racks so I made a beeline for one of them. I warmed up with back and front squats with the bar, 10x for 2 sets. Then I decided to do 5 barbell complexes, only with the bar, for 10 minutes.
Deadlift
Bar to chest
Front squat
Overhead press
Back squat
End.

5 times, with a 2 minute breather between sets, and my legs are now like jelly.

Amazing how 34 minutes on the treadmill does NOT feel like 10 minutes with the bar. :P

But most important of all, I went.