Or "one last try!"
or "Hold my beer"
I did all that the other week......at a Roller Skating Disco (Don't ask why I was there, lets just say the word Female.) Anyway, I was doing 'Okay' - I can ice skate, but roller skate with 4 wheels is weird!, Anyway, the guy announces can everyone vacate, this is for Exp skaters only, we are doing speed skating.
We all got off, 6 people on there, saw a few laps and said to everyone 'F*** this, that looks easy, watch this!, did 1 lap fine, nice and fast, 2nd lap, came out the corner hard, barrel rolled and ended up into the wall with a skate off and the audience pissing them selfs xD