An airstrip is not a strip of air. Nor is an airstrip a striptease performed by a stripper in midair, such as, say, on from a trapeze.
Contrary to what you might think based on the word alone; an airstrip is not in the air at all. It is a runway resting firmly on the ground. This is convenient because airplanes would have a hard time taking off and landing from a strip of air above the ground, and facilitating airplane takeoffs and landings is exactly what an airstrip is supposed to.
An airstrip does not have any airport facilities associated with it, otherwise it would be called a runway. Airstrips tend to be used by small, private planes.
If you’re on a commercial airline’s jumbo jet and you’ve just landed on an airstrip, it’s a pretty good bet that you haven’t landed in the place listed as the destination on your ticket. Plus, you’ve probably had a rather bumpy landing. But you, having just gone through it, would know more about that than I would.
Considering that it was likely a major mechanical failure or an emerging disaster that caused the pilot of your jumbo jet to decide to land on a landing strip rather than at the nearest airport, major panicking before the landing would have been understandable. You might want to check whether your underwear needs changing.