Hay strung 

Burn out on weed!

I think you're a little bit too hay strung!

Hay strung by ianswerit March 3, 2011

Hamstrung 

1.Someone who got his achille's heel cut.
2.When you are about to say something very crucial in an important discussion and suddenly someone makes a totally ridiculous comment in order to produce laughter, feeling the matter is too hard to be sustained.

1.I saw an opening in Broderick the Morög's armor; but as I was about to thrust my spear into his sinews, Fegellahar the Small attacked me traitorously; I was hamstrung, almost fainting with pain.
2.I was about to explain to the engineers the crucial relationship between plastic fabrication and beezwax, but Roger boasted this ludicrious joke about vaseline; I was hamstrung.

Hamstrung by OllieTheKid October 7, 2006