For the 100 meter course the world's best sprinters will need almost 10 seconds.
For 100 swiss francs you get already a better meal for two persons, maybe even with 3 dl of wine.
More than 100 Bq/kg of radioactivity are in the range of values for foods. 100 Bq of I-131 can safely be absorbed into the body. Although it would still be measured but due to the short half-life of a few hours very soon subsided.
If somebody is young and athletic, he can stop breathing for about 100 seconds.