Blast line

A blast line is a boundary on a stage in the  series and Fraymakers that a character cannot cross without getting KO'd. Some stages have blast lines that are accessible by simply walking into them such as in Super Smash Flash or Skull Fortress in Super Smash Flash 2. Other stages have large blast lines due to their large areas, such as in Super Smash Flash 2.

There are four blast lines, usually referred to as "bottom"/"lower", "left", "right", and "upper"/"higher" (alternatively, "north"/"south"/"east"/"west"). The bottom blast line can also be referred as the "pit" and the upper blast line can also be referred as the "ceiling." Characters KO'd via the upper blast line in SSF2 are either Star KO'd or Screen KO'd.

Trivia

 * In the original SSF, the upper blast lines of all stages except for Peach's Castle could be crossed merely by jumping high enough, making aerial camping with characters that have multiple jumps such as, , and a dangerous and self-destructive option. This was fixed in SSF2, where crossing the upper blast line without being attacked will do nothing, as it is in all official games from Melee onward.
 * Prior to v0.8a of the SSF2 demo, the characters KO'd via the upper blast line would neither be Star KO'd or Screen KO'd, and instead they would be KO'd normally.