I have had a TON of fun in Halo 5, and a TON of funny\awesome moments. What about you?
My best moment was when I hijacked a ghost while it was going off a man cannon. I kicked the guy off and he went flying!
I was being shot from close range while holding a sniper rifle, so I panicked and pulled the trigger and drilled the other player right in the head. 100% luck, but 110% happiness.
The moment when I hijacked an enemy warthog (driver side) and drive the remaining passengers to fall to their death only to eject myself at the last second.