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Smashing your glute is fine. All depends what you are looking to impact.
If something feels sketchy it is so stop doing it.
If you feel nervy pain stop.
There is alot of work you can do without being on or near the sciatic nerve.
Unglue laminated tissues using a pressure wave, smash &floss, or contract and relax.
Address the side of the glute, high glute etc..
Be smart with what you are doing.
If you have a question on something ask someone.