You just reminded me that in my lvl, you can pass through warps. Your'e going too fast for the warp to "pick you up". Also, Link, I tried putting solid tiles into my lvl....AND IT WORKS!!!!! You're travelling so darn fast that you can pass through anything!

EDIT: Yep, you can pass through anything. Baddies, pick-ups, power-ups, giant boulders...not even your bullets can hit them. The fencer has uber-l33t reflexes though. Even at my speed, he managed to turn the right way and face me.

EDIT 2: At my speed, you can pass through a maximum of 4 completely solid tiles. The bullet explosions will also pass through 4 tiles (it explodes behind a tile when fired in front of it).