The crackle of the air moving back and forth during a shuttle launch would be so fast and intense that the friction of the air (near the launch pad) would set the grass on fire.
Gee, K. L., Mathews, L. T., Anderson, M. C., & Hart, G. W. (2022). Saturn-V sound levels: A letter to the Redditor. The Journal of the Acoustical Society of America, 152(2), 1068-1073.
https://web.archive.org/web/20220831190741id_/https://asa.sc...
"While this peak level represents acoustic amplitudes that would propagate nonlinearly to rapidly form shocks and result in perception of jet “crackle” (e.g., see Gee et al., 2016), will it melt concrete or set grass or one’s hair on fire? It will definitely not."