can get in and out of as many times as you like
My first floatplane lesson started with getting in and out.
Time after time after time, until I could do it in a couple of seconds, as necessary both after pushing off from the dock - got to get in and start the engine before it drifts into something expensive (worry about seat belts later) - and when arriving at the dock - got to get out, jump onto dock, grabbing ropes as necessary, and fend off again before an expensive collision.
Part of getting out in a hurry is not to tangle yourself up in the headset leads - has anyone mentioned this yet?