Crashing

Put the summary of the bug you're having here

*What I expected to happen was...:
Describe what you thought should happen here
i downloaded the sphere hd texture pack and it completely crashed minecraft i can't go on it as every time i go on it stays on the majoring screen

What actually happened was...:
Describe what happened here
i downloade sphax without realising it was the hd version and equipped it then it threw me off the game and it keeps crashing now

Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. download sphere hd
3. equip it
4.throws you off
5.go back on
6. Crashes