Level skip
Press / to put a flare in Lara's hand. Then have Lara walk one step forward (with [Shift]), one step back (with [Shift]), rotate in three full circles in any direction (with [Shift]), and jump forward (with [Alt]).

All weapons
Press / to put a flare in Lara's hand. Then have Lara walk one step forward (with [Shift]), one step back (with [Shift]), rotate in three full circles to the right (with [Shift]), and jump back (with [Alt]).

Exploding Lara
Have Lara walk one step forward (with [Shift]), one step back (with [Shift]), rotate in three full circles to the right (with [Shift]), and jump back (with [Alt]).