Bridge Hopping is basically a more advanced chamber, you must know how hopping works and then use that on the edge of light bridges to advance across gaps. Difficulty increases as the level progresses (solution below).
Also I managed to solve some of the "unsolveable" chambers that people made, mainly these 2:
"IMPOSSIBRU MAP" and
"Friendzone". Note that I still think they should make it so you have to solve a chamber once to even publish a map.