A fantastic photo of the Singapore Waterspout (Image Credit: Spam for Sam [Flickr])
A few days ago, this giant waterspout [wiki] (50 m or 164 ft. diameter and average wind speeds of up to 150 km/hr or 93 mph) was spotted in Singapore. Apparently a large waterspout can be quite dangerous - it can spin a small ship around (Videos).
Links: Channel NewsAsia article | More images at Cellar IotD - via Scribal Terror