Way to maintain your composure, and ride it out....nice job!
Whenever I'm following a cage, I try to make a conscious effort to not ride in the middle of the lane, for that very reason. Cagers see a small object in the road, that they know they can straddle, and don't even tap the brakes. Not a lot of time to react, when it pops out from under their bumper. I like to ride right in a cages wheel track. Figure they don't want to hit anything, any more than I do! If they swerve, i swerve. Least I hope so, anyway.
Glad you and the lady were without a scratch. Bikes are easy to fix.
2009 Vivid Black FLTR/120R/Dewey's headwork/TMan 625G/Fuel Moto XXX 2/1/2 w/4" mufflers/HPI 55