As strange as it may appear, the running of the bulls (Pamplona style, if you know what I mean) was very popular in Venice, during Carnival time (17th century, until the beginning of the 19th century). Thinking of it, in those narrow streets, and with the channels, it must have been really wild.
Bull chasing was usually admitted from the first day until the last Sunday of Carnival. The chasing started (each day in a different section of the town) every day of the week except Friday, right after lunch.
The final feast (bull for dinner, I guess) was every night from 10 PM until midnight. I guess the fact of it being possible to jump in the channel in case of danger, helped a lot the population rate not to drop too dramatically in those times.