For awhile now, wert has been saying it is possible to get up between the spikes on parallel level 6 with unstable explosions, however there was no concrete proof of this.
Credit for this goes to billybob, for posting this link in another thread. This shows Diccy, on the french server I believe, getting up top. However, it does NOT show what happens when you fall down, so that is still unconfirmed, if indeed you skip to near the end of the game or not.
[lien=www.dailymotion.com/diccy91160/video/x6uja4_niveau-60-explosifs-instables_videogames]Parallel 6 Secret[/lien]