Check out this instructional kickboxing video that demonstrates how to do a kickboxing sidekick. It's more a like a snapping kick, and you utilizing the blade of your foot. Try a sidekick next time you're in a kickboxing jam. Learn the skills of kickboxing in this video on competitive kickboxing moves.
Take action and remember these tips:
Start from fighting position
Turn hip over
Deliver kick with blade or heel
Reload fighting stance & repeat