I like the Wart hog dispension trick. This could work with grenade or weapons or anythign really... you oculd use angle grav lifts. well done
On sandbox, using long stone pillars on huge blocks makes a good height for interlocking Tubes into double blocks. So there is no bump but you can walk into them. the downside is that you can crouch jump onto the tube after, but it minuses using a ramp ($5 extra) on it. Best used as walls or you would be wasting money on the double boxes. Still awesome!