i guess, make the artsy side of skateboarding better. >> he puts the plan into motion, choosing the mission bay bridge in san diego. >> we had the lifeguard and boat, so we had somebody in the water. we add lot of friends. we ended up doing the stunt. from the time the ramp was on bridge to off the bridge was 4:30, i believe. so it was pretty quick. we were just hoping no policeman would drive by at the time. >> since what they are doing falls some what outside general traffic safety rules, they moved quickly. >> love you, brother. >> but of course the unforeseen obstacles are the one teas complicate things. in this case, something called speed wobbles. >> >> speed wobbles is when your board is not adjust had properly. maybe your settings are too loose and you're not prepared for speed or your weight is distributed unevenly. in it case the rope pull medford