Venetian Rush was a virtual representation of one of Ezio Auditore da Firenze's genetic memories, relived by Desmond Miles in 2012 through the Animus.
Ezio Auditore came across a thief in Venice, who challenged him to a race.
- Thief: I hear you're pretty fast. I'm bit of a speedster myself... you would honour me by granting a quick race...
By navigating through various checkpoints along a course, Ezio freeran across Venice and finished first.
Ezio speaking with the thief
Ezio freerunning across Venice