Managed to make my battery spark/short

My battery needed replacing on my iphone 6. I ordered a new one and followed a good Youtube video on how to replace it. Anyway I got to the part where I had to remove the battery and like an idiot I used a flat bladed screw driver and tried to pry the battery away from the glue (I removed one row of glue using the tabs). Anyway a small spark (almost like when you initially light a match) came from the battery then died down, then appeared again 20 seconds later. I quickly put the phone in a sealed bag, into a metal tin and now its outside.

What I want to know is, should I attempt to carry on? I don't want it to explode and potentially hurt me, or should I just bin it (properly) and buy a new phone? Thanks for the help in advance.