You felt hands choking you from behind? I would first make sure it's not someone pranking me. If it wasn't, then I would probably budge into their stomache and run for a little before I turn and fight back.

You couldn't tell if you were dreaming or not? I'd probably just see if I can find things out for myself. When you're dreaming you just sit back and watch the show, but in real life you can find things out for yourself.

You woke up in a small, metal box? I don't know WHAT I would do, because you can't really even move around, let alone breathe and find anything to use to get out. The box is completely empty, so my best bet is to A. Find out if there's anything in the box I can use. B. See if you can't get out just by kicking really hard on the box. or C. Just try to stay alive and wait to see if anyone will find you.

if it's joking from a dude,i'd do it back

if it's joking form a girl i'd hug her

if it's' serious from a guy, i'd fight him

if it's serioius from a girl,i'd walk away