Bay seniors, cynical, jaded and yawning, who think they’ve seen everything, are encouraged to amaze themselves with a visit to the Aquanuts this coming Labor Day weekend. They are a troupe of synchronized swimmers( a breeding ground for 17 Olympians) performing at Heather Farm Park in Walnut Creek. This extravaganza pushes the incredulity boundaries even further with a theme celebrating the Earth as seen through the eyes of extraterrestrials.8pm. $10-20. The Geezer applauds their skills and water choreography but suggests a name change might be in order.