As we all know, if matters travels through the gate, it will rematerialize on the other side exactly the same as it went in : same speed, same angle, same form.
But, what happens if :
- The gate they travel back from is horizontally placed ? (f.i. the harvester gate in 2001)
- The gate they travel back from is rotated ? (not happened, but could always be)
- They gate they travel back from is not on a pedestal but fully uncovered.
In all three cases, it would be extremely hard for the SG teams to correctfully asses were the Earth ramp is. If they wouldn't jump high into a fully uncovered gate, logically, they'd be risking having their legs rematerialize inside the iron ramp on Earth... let alone risking decapitation when jumping into a horizontal gate (as Carter did in 2001)
Makes you wonder, doesn't ... the ramp is freaking dangerous !