Originally Posted by
Kolossi
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I'd strongly advise the sensible eating
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It's sensible everything really - not too hot nor too cold (e.g. appropriate and comfortable dress for the weather), not too full or hungry, not thirsty or bursting and of course not tired. Relaxing helps as well, which I guess is easier said than done, but apprehension should start wearing off after a few flights.
The one thing that made me feel very ill after about 30 minutes was a faint whiff of fuel - suddenly we had to go back, right now! We got back in time, and once I was back on firm ground and in fresh air I was fine again.