I was doing a night dive with my Japanese dive buddies in the warm fall waters of Yokosuka Japan. A few days later through the news we found out we had been exposed to a smalll amount of radio active materials in the water. Source: unknown.
I was coming up from a 90ft dive and had a run away ascent from 85 feet due a malfunction in my BCD. It was a wiled ride but it did not do any harm to me or require recompression. I exhaled all the way up so I would not embolize.