There is no depends. Meta knight has you offstage, he dairs at you at a distance small enough for it to hit you before you can commit to an aerial, what do you do?
The answer is the ONLY thing you can do is air dodge, you're now at a frame disadvantage as he can throw out a second dair before you can do anything, you lose a stock.
On stage? Fine, put up a fight. The second you get put at around stage level and far enough to have to double jump, that's called a free stock. Human error can make this not happen but that's on the fault of the meta knights. Note that things like this severely polarize a matchup, I can freebie an olimar's sotck 95% of the time because of something like this and that takes an 8-2 disadvantage and makes it a 6-4. If you're already at a disadvantage what do you think a free killshot trap does to it?