Image transcription: Cereal guy meme template. In the first frame he says: “Hmm, wonder whether trills can be aspirated”. In the second frame, as indicated with IPA, he articulates a heavily lengthened preaspirated voiceless bilabial trill, thence spitting the cereal.
And no, you can generally only aspirate obstruents, hence the preaspiration.
Duh, you’re right. I’ll remove the comment above to avoid misinforming anyone.
Thanks for pointing this out. (Note to self: limoncello and phonetics don’t go well together.)