Just a small piece of info for people who didn't know this. The levitation effect normally just levitates you into the air but if you set the amplifier to a very high number the actual effect becomes something different.

Amplifier 1 - 127 is the normal levitation effect with different speeds.

Amplifier 128 - 250 pulls you to the ground and won't let you jump 1 block high. Depending on the amplifier it can pull you faster or slower to the ground and jump height varies from barely getting off the ground to being one pixel away from climbing to the next block.

Amplifier 251 - 254 is similar to the slow fall effect but it's much slower.

Amplifier 255 locks your current y position. (small disadvantage is that you move as slow as if you have the levitation effect... well which you have)