Play the Heledoorn map. Go to the position (spawn point)
to the south of the airfield, playing as British. Go to the big
white building and get on top of it. This is done easiest by
using the mini plane. Look down and get above the "bunker
building". Enable the "Invincibility" code. Keep
looking down and fall to the ledge below. Keep looking down; this
works best if you look almost straight down, but do not use the
parachute. When you hit the ledge, the game still thinks that
you are falling and will soon "crap your pants". However,
if you look upwards slightly (not level or up or it will end),
you can do this until you get to the water.