I also have a degree in plant biology, and I'm baffled. What the hell were they watering it with? Petroleum?
"Dive, dive!" yelled the captain through the thing. So the man who makes it dive pressed a button or something and it dove, and the enemy was foiled again. "Looks like we foiled them again," said Dave. "Yeah," said the captain, "we foiled those bastards again, didn't we, Dave?" "Yeah," said Dave. The end.