I get what you're trying to convey here but not all disabilities are treated equally. Making fun of those with speech impairments is still socially acceptable to some degree than other disabilities like mobility issues where it isn't. I've also had moments where I get blocks and just stuck in the middle of my speech and the other person hangs up, walks off, or just takes over...how am I the problem then and not the stutter or other folks? I agree with the sentiment though of pushing yourself to your limits.