I managed to flush a small hard plastic funnel with the small end going in first and its tihghtly stuck! I can't grasp it enough to pull it out. Any ideas

needle nose pliers

Assuming you see it, and it is visible, yes, pliers, or razor knife, make slit in it, and then use bent metal in slit to pull it out

Bend a hanger with a small hook on the end. Push hooked end through small hole and pull backwards.

In the worst case scenario, dismount the toilet, flip it over and push the funnel back out.

I would definitely not try to push it in - and flush it down the pipe - as I am pretty sure the funnel would get stuck somewhere in a bend down the sewer pipe. Then, locating the funnel in your sewer pipe system, and removing it, could cost you a bunch.

Milo