You may have a mouth ulcer if you have: 1  A painful sore or sores inside your mouth, on the tongue, soft palate (the back portion of the roof of your mouth), or inside your cheeks. 2  Sores in your mouth that are round, white, or grey in colour, with a red edge or border.
Perpetually moving minecart track. Works underwater and above. Upvote this! http://redd.it/m9zrx. If you are using this for survival, make sure you have air bubbles along the way (such as signs) so you can breath. Song: Rainy Day in Paris: http://www.newgrounds.com/audio/liste...
Re: How exactly do snorkels work when you are under the... Or more to the point: Snorkels don't work under water. They work on the surface by allowing the wearer to have his/her face in the water so that one can look at what is going on and the top of the snorkel is several inches above the surface allowing the user to breath through the tube.