She swerved to miss another bike rider coming out of a tunnel.
I'm guessing one of them was on the wrong side of the tunnel bath
I guess it could have been worse had they crashed.
What is a tunnel bath?
"TUNNEL BATH
Phototherapy, usually employing infrared light, may be applied from a radiant heat source over part of the patient to be treated in the physiotherapy department, or an array of lamps may be used in a special frame forming a tunnel over the patient or part to be treated. The main effect is superficial heating causing increased blood supply, relief of pain, muscle relaxation and perhaps biochemical effects. Similar types exist employing ultraviolet fluorescent tubes providing UVA (280-400 nm), sometimes called the Theraktin tunnel."
What this has to do with bicycling is beyond me