Originally Posted by cattle
Here's the dangerous part of my UA routing. I have a 50 min connection time in ORD

Haven't flown through for some years but I'g going to guess I might get to work up a sweat running for gates if things go wrong. I will only have carry on. Any last thoughts?
I have no idea where you're flying to, but the only thing to note is the escalator construction for the underground tunnel joining the B and C concourses. No biggie but something to note.
All UA metal flights to Canada are out of B (not including UAX).
If you're connecting from T1 C25 to something like T2 F12 (or vice versa), you might want to take the airside shuttle.