Dropping like flies

That was the comment of one baker on last night's Great British Bake Off when one contestant walked out, one collapsed and another fell off his chair.
The contestant who left mid technical challenge disappeared halfway through the first episode but was ok for last night's show. He was making peppermint cream biscuits when he suddenly downed tools and walked out of the tent. He seemed way out of his depth making me wonder how they choose the final 12 bakers to appear on the show.
The lady who collapsed was cared for by paramedics and took no further part in the show and the other man misjudged reaching for his water bottle and fell of his chair with a right wallop.
Never has there been an episode like this on Bake Off.