Only if you're first in line, and only if you have enough juice to get to the SuperCharger.
Each SuperCharger has around 4 to 8 charging stalls: http://insideevs.com/break-charging-points-98-tesla-superchargers-us/
“Only if you’re first in line, and only if you have enough juice to get to the SuperCharger.”
And only if you paid for the option of supercharging. It’s not on the base models.