Why a Fan Gave Layla Clark’s ‘Thunderstruck’ Three A-Pluses

One viewer responded to Layla Clark’s “Thunderstruck” by making up a report card. Performance, passion and skill each got an A+. The last line, about what the viewer saw as the best of America, was off the charts. It was a school joke that happened to fit the performance in front of it.

Clark is a mallet percussionist with the Thomas Jefferson High School marching band in Pennsylvania. In the video, recorded at a 2025 football halftime show, her section opens with the rapid figure AC/DC listeners know from Angus Young’s guitar.

Notice the spaces between strikes. The mallets have to leave the bars cleanly and be in position for the next note while the pattern stays even. At this distance, the phone camera catches the preparation for each strike as clearly as the strike itself.

Then there is the matter of how long the section has to keep that going. The opening leaves the mallet players exposed. In the Pittsburgh Post-Gazette, Clark recalled that they stopped on an early run-through because the rest of the band was quiet and they thought they had made a mistake. The space was part of the arrangement.

Clark’s mother told the Post-Gazette that some of the practice happened at home on a small glockenspiel. The small bars gave Clark a tight target. By the time the phone camera caught her on the field, the audience was seeing the result of those repetitions.

On the first pass, follow the pulse even as Clark changes where her hands land. On the second, watch the band behind her. Those two details explain more about the work than any letter grade can.

Hear the guitar part that started it

AC/DC’s original recording gives the opening figure plenty of room. Compare the note spacing with the school arrangement to hear what Clark’s section kept when it moved the part to mallets.

Another version that depends on precision

The same pattern sits differently under the hands of 2CELLOS. The change in technique is obvious on screen, even as the first notes still tell you exactly what song you’re hearing.