Once you step out of T spawn, you're right up and into the action. Going towards B, you can see down canals, and not the first, but the second bridge is where you want to head to. It takes practice, but bouncing a flashbang off of the edge of the second bridge has cataclysmic results for snipers down canals.

Try to bounce it off of the following edge, and remember, grenades dont go directly out from your crosshair when you throw them.

If done correctly, the flash will go right above the bridge and pop, leaving the enemy on the opposite end full flashed if they do not look away.

This can be avoided by looking away quickly, but may not entirely be expected by them. There is also the fact that if they have any visibility of above the bridge, this flash may also catch them from the angle they can see it from, making those camping bridge on the upper catwalk bit full flashed as well.
Note: If they can see you within the yellow zone, you may die. Make sure to pop a smoke off before doing the flashbang strategy if a threat is present.

It bounces of the angle of the bridge railing.

This method may require you to do such things as:

• Jump forwards and then do it
  
• Find ways to put extra velocity into the throw
  
• Get a correct angle

I would like to thank you for viewing my guide. Please rate this up, so this method will be widespread and will help many CS:GO players.
If you have any questions, friend me on steam.
And yes, it is quite possible.

This is my first, professional guide, so make sure to leave suggestions and corrections in the comments for me!