1. Someone climbs to your location from the ground, or descends from the top of the route, hauling a sufficient amount of gear for you to rappel or be lowered to the ground. Obviously impractical on massive routes like El Cap.
2. A rescuer is slung onto the route near the incapacitated climber's location using a helicopter long-line. They prepare the climber for extraction and then they are both slung off by the helicopter at one time.
You can't just insert yourself into someone else's big wall party if they weren't planning on it; those other climbers would be spending multiple days on the route and would almost certainly not have food, water, and portaledge space for you (not to mention how profoundly rude that would be...). If you were indeed at the mercy of needing strangers to rescue you, a passing party or a rescue party would need to change their plans and retreat with you, which would only really be a good call if your life were at risk otherwise.
The more realistic plan would be to have some friends ready and willing to come retrieve him if needed, and to potentially stash some gear/supplies at the larger belay ledges a few days prior.
> You can't just insert yourself into someone else's big wall party if they weren't planning on it; those other climbers would be spending multiple days on the route and would almost certainly not have food, water, and portaledge space for you (not to mention how profoundly rude that would be...). If you were indeed at the mercy of needing strangers to rescue you, a passing party or a rescue party would need to change their plans and retreat with you, which would only really be a good call if your life were at risk otherwise.
yeah, you can, it's called hitchhiking. it's not very common; but it has be done, Lynn Hill talks about it in her autobiography. if the climber hitchhiking is good enough, the new party will be faster in the end.