- In normal adult humans, the rate of excretion of gas per rectum ranges between 200 and 2000 ml per day.
- Most people produce about 1 to 4 pints a day [that’s 473-1893 mL]…passing gas 14 to 23 times a day is normal.
- Greater volumes of gas evacuation were associated with both increased number of evacuations and larger gas volumes per evacuation. The number of gas evacuations linearly increased from 2 ± 1 per hour at 0 mL/min infusion to 22 ± 2 per hour at 30 mL/min. Likewise, the gas volume per evacuation increased from 11 ± 4 to 76 ± 8 mL, respectively.
It would seem that if one could maintain a small evacuation volume for each event—i.e., closer to 15 mL/fart than 84 mL/fart—that 72 FPD—i.e., 1080 mL per day—would not be unreasonable.
 From Pathophysiology of the digestive system.
 From the National Digestive Diseases Information Clearinghouse
 From “Intestinal Gas Dynamics and Tolerance in Humans”, Serra et al., Gastroenterology, 1998. [Gas was pumped into folks and their evacuations were monitored in a clinical environment.]
Bumped from a flight and afraid to nap is a very dangerous kind of found time.