Snowpanes

Overview
On top of a lonely, frigid hill lies a short and sweet pathway to the STOP Pad, but it's not as easy to reach it as you think! The stage Snowpanes appears to be even colder than Iceway; there are frozen hills in the far distance, there are spruce trees, there are ice shards on the walls, and there are mysterious white & gray tiles that are blocking the path to the STOP Pad. These arches ahead that are blocked off with Snow Panes - which have thick layers of ice, sediment, and snow. Remember how ramming the marble into Ice Panes clears them with ease? Well, you can't do that with Snow Panes! You have to figure out how to clear them without ramming marbles into them.

Description
A harsh blizzard shuttered arches with thick Snowpanes. Find a way to clear them out.

Help Text
Snowpanes have thick layers of ice, snow, and sediment mixed together. If your marble won't clear them, what will?

Trivia

 * This is intentionally the first time you are meant to use a hazard to clear another hazard.
 * Point a cannon in front of a snow pane - you have to be right by it. Once it fires, get out of the way and watch the ammo clear the snow pane.
 * This is the first stage in the game to introduce a new hazard not found in the tutorial section.

Errors

 * There's a bug where you can clear Snow Panes and they can stay cleared when you restart the stage immediately.
 * It was confirmed by Jiquor that this is a valid speed-running trick.
 * In the title, description and help text: Snow Pane is spelled inconsistently ("snowpane").