Light a flare and while holding down Shift, take one step Forward, one step Backward, turn
360-degrees in either direction three times. Then you can either Jump Backward to get all the
weapons or Jump Forward to skip the current level and go on to the next one.
Turn around three times and jump forward to see Lara detonate.
How to do a dive: While holding Action and Walk, press Jump and Forward.
How to do a handstand: When hanging on a cliff, hold Action, and Walk, then press Up.