They say it’s about the journey, not the destination—but when air travel is involved, the journey can often be more difficult than enjoyable. Still, that doesn’t mean that basic courtesy should go out the window. In fact, it’s all the more reason to be extra considerate. Here are eight things you should never do on a plane.

Touch the Flight Attendants

According to flight attendant Aiden (who didn’t reveal his last name for privacy reasons), there is never a time when it’s appropriate to touch a flight attendant. “Do not touch your flight attendants, period,” he says. “When we are moving about the cabin—whether it is to serve a meal, prepare drinks, or collect garbage—we can still hear you! A simple ‘sir’ or ‘ma’am’ will get our attention.” After all, it’s generally not appropriate to touch someone you’ve just met.

Ask to Use the Lavatory Right After Boarding

Need to use the bathroom right after boarding? Be aware that you may be holding up the plane. It’s the worst time to be anywhere but your seat—plus, you likely had a chance before boarding. “Why didn’t you use it in the terminal?” Aiden asks. “When you’re boarding, the flight crew has different tasks to handle, both those you can see and, more importantly, those you cannot. Things like monitoring overhead bin space, identifying passengers we can rely on in an emergency, and communicating with the flight deck and ground personnel.” If you’re still not convinced, know that bathrooms in the airport are far better than compact airplane stalls.

Put Your Arms, Legs, or Feet in the Aisle

Aiden acknowledges that airplanes aren’t the most comfortable environments, but you need to keep your limbs to yourself. “Sometimes you need to stretch, but when we’re trying to pass through the cabin—whether it’s for service or just monitoring—it’s frustrating to have to wake every single person blocking the aisle,” he says. “That being said, please just be courteous about your space, and if we ask you to move, please do.”

Run to the Front of the Plane Right After Landing

Sure, you might be eager to get off the plane, but so is everyone else. “Upon landing and arrival at the gate, please don’t stand up and bolt to the front of the airplane,” Aiden says. “It’s quite rude to other passengers, and frankly, it’s inconsiderate.”

Question the Flight Crew

Aiden warns that doubting the flight crew—or refusing to listen—is a bad idea. “If we ask you to do something, we have a reason,” he says. “Please don’t question us. Flight attendants go through five to eight weeks of rigorous training before we’re even allowed to step foot on a real aircraft. Many flight attendants, including myself, compare their initial training to taking a full semester’s worth of college classes in under two months.”

You might not know that flight attendants are trained to do much more than serve drinks. They learn how to open multiple types of aircraft doors, perform CPR and AED usage, deliver babies, and even fight fires. “Yes, we know how to pour Diet Coke, but there is so much more to our job than that,” Aiden says. “We are aviation’s first responders, so please treat us as such.”

Put Your Feet on Someone Else’s Armrest

Etiquette expert Jenny Dreizen says that putting your feet on someone else’s armrest is a big no-no. “We’ve all seen it: the toes creeping from behind our armrests—it’s like a horror movie with a very boring premise,” she says. “I live internationally from my family, so air travel is a big part of my life, and I know as much as anyone how wildly uncomfortable flying is—but you still cannot put your feet on the back of someone else’s armrest, I’m sorry. We must maintain some decorum.”

Go Barefoot

Dreizen insists that taking off your socks is not only unacceptable, it’s also unhygienic. “Plane floors are dirty, and I don’t want you to catch anything,” she says. “Also, we don’t want access to your feet. Keep them sheathed. The best idea is to wear your shoes and keep your socks on at all times.”

Recline Without Consideration

It’s okay to recline, but it’s important to be mindful of others, according to Dreizen. “As annoying as it can be to have someone recline in front of you, it’s not their fault that the airplane is shoving everyone too close together—they’re just trying to be comfortable,” she says. “That said, it’s a good idea to recline slowly if you can.” And check behind you to see if the person has drinks or a laptop on their tray—a quick heads up that you’re about to recline is courteous.