ANY fish can jump. That's the safest avenue to take. Any fish can become spooked and in it's mad dash to safety it can (and usually does) find the missed opening and go airborne.
mine has jumped out twice in the last month so i am currently building it a pond.
i think it jumped because i spooked it and the tank is a little small.
Yeah, bowfin can be very spooky. All of the bowfin I have kept over the years had the ability to thrash about and jump for freedom. Most of the time, the bowfin would bounce around the tank pretty quickly. I have only had one bowfin (about 18") totally jump out of its tank, smash off the wall, bounce off the desk and fall to the floor. That was a little crazy. I was just trying to clean the tank and then found myself wrestling a bowfin on the floor.