An earlier discussion here about a flight attendant helping with a pilot incapacitation:
http://www.pprune.org/rumours-news/4...ane-ohare.html
And, a gushing Fleet Street account "Off-duty pilot lands plane and saves 160 passengers...":
Off-duty pilot lands plane and saves 160 passengers after captain suffers heart attack - Mirror Online
Some airlines have the first officer taxi with a tiller on the right side, many do not, I've seen it both ways over the years. I think all A300's (and A310's) had two tillers until American Airlines got a supplemental type certificate removing the right tiller.
Do some 737's have both tillers?
I'm not too keen on letting the right seat pilot take a high speed turn off without a tiller, the transition to taxi speed can be a little awkward as you try to brake and turn with only the pedals in my opinion.