That depends on how you feel about bottle bombs.
Having a shot of Colette.
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Harvesting yeast doesn't mean it'll be a bottle bomb. Sounds like yours may be infected but his aren't. Not sure.
Water. Mowing the lawn and dying in the heat.
I have drank a couple cases of Colette this year and have never had an issue with gushers. I have never harvested yeast from a bottle and not sure if it's worth it given that it's a blend of 4 Belgian yeast strains. Would I end up with a yeast that has the same proportions of each strain? I doubt it.