cant get out of minecart

What I expected to happen was...: get into minecart to get to house
Describe what you thought should happen here that i would get to my house without a doubt

What actually happened was...: it didnt let me get out and i was in creative mode
Describe what happened here i grabbed a bucket of lava and dug two holes infront of me and it got me out

Steps to Reproduce:
1. place mine cart in creative mode
2. ... get in
3. ... cant get out