Coke burns a LOT hotter than weed - dangerous for your throat, especially if you aint using a filter...

Best way is to smoke yer blunt..
Snort yer line, leaving a little behind..
Pick the filter out of a cigarette, and rip a little of it off - then put it back in...
Empty about 0.5cm of the baccy outta the end of the ciggie...
Suck up the remaining coke into the ciggie and twist the end so none comes out (suck hard - you wanna get the charlie right down the ciggie)..
Light -- and enjoy...

BTW - DON'T DO COKE OFTEN - IT DESTROYS LIVES!!!