Here you go....
Presenting Exhibit A: my impressive reaction to a horsefly bite 😱
Please note I am not worried about it, I don't need medical advice/attention and I know what to look out for and when to get it looked at. I live on a farm so it's not uncommon for me to get bitten and react like this!
That said, I think this is the biggest blister I've had from one - it bit me twice before I got the fucker away and the two bites were originally separate blisters until I woke up this morning.