The rivers in Idaho are overflowing right now due to heavy snow melt, active rain and warmer (I won't say warm simply warmer) temperatures. Water is pouring off the mountains with no sign of letting up. Wikipedia defines a strainer as a sieve or sifter "a device for separating wanted elements from unwanted material". In the case of a wade fly fisher, a strainer is submerged tree limbs from winter deadfalls which separates you (the wanted element) from the unwanted material (the moving river water) and leaves in the strainer only you. But unfortunately you are frequently in your waders, under the water and unable to get out of the tree limbs in which you are trapped due to the torrential springtime river flow. Therefore, you DROWN. And, as in the photo atop, rescuers must come out and retrieve your DEAD body for your wife and kids, who are usually quite PISSED.
Lastly, please be careful when wading and Idaho fly fishing this and any time of year--but be particularly careful in the spring. Many die each year due to these. See the PS below for 2 examples.
Get out there and have fun and be careful. Hard takes, tight lines and screaming reel to all.
PS-From Adventure Risk Report January 2012
"Four dead from fly fishing? Not considered a particularly a high risk activity, this past summer rocked the fly fishing world when within one week two accidents killed two people each. All four deaths happened on guided trips. What is interesting is the denial of the elephant in the room.