The reason why your koi is trying to jump out is because i can say right from the start that your tank is too small for a koi of that size, as goldlenny says koi can grow to to 3ft long and basically an average aquarium is no place for a koi carp. I would strongly advise rehoming it to a pond of at least 1200gallons and at least 4ft depth which is not overstocked.
This is your stocking in your sig;
10 Gallon-3 Guppies,3 Tadpoles,4 Corys,2 Swordtails,1 ACF,1 Snail
10 Gallon-2 Common Goldfish,1 Comet Goldfish
2.5 Gallon-1 Firemouth Cichlid,1 Hybrid Cichlid
2.5 Gallon-1 Blue Paradise Gourami
1 Gallon-1 Blue Paradise Gourami
1 Gallon-1 Male Betta-St.Jimmy
1 Gallon-1 Female Betta-Black Ivy
Other Fish-1 Koi, 3 Goldfish,1 Platy,1 Pleco
Although this thread is about the koi, i cannot but help point out that a lot of your other tanks are very overstocked or have generally unsuitable stocking tank mates wise etc.
African clawed frogs can grow to the size of a fist and will devour any fish they can fit into their mouths, they will also often try to swallow fish that they can't even swallow hole. So in the first 10gal, every fish is at threat from the ACF at the moment. Swordtails also grow too large for a 10gal, many swordtails can grow to 3-4inchs long and need at least a 15gallon for a trio.
Common and comet goldfish can easily grow to over 12inches long, so a 10gal is no place for such large growing varieties of goldfish, they need at least a 75gallon long tank minimum or a pond of at leats 3ft depth- i would definately advise rehoming these fish if you have no suitable accomodation for them to live permanently in.
Firemouth cichlids can grow up to 6.5inches long, i wouldn't put one in anything less than a 3ft long 30gal tank. There are no hybrid cichlids that i know of that can go in a 2.5gal either.
Paradise gourami's grow to 4inches long each, i wouldn't put them in anything less than a 15gallon long tank.
Platys are sociable fish and do best in groups of at least 3 (depending on the genders) and need at least a 10gal long tank, while most plecos sold are common or sailfin plecos which need at least a 5ft long 18inch wide tank for smaller specimens, and a 6x2x2ft tank or more for larger growing specimens.
Basically, if you keep keeping the fish the way you are, you will have a lot of unhappy and short lived fish. You really need to do something about the stocking of your tanks if you are to be a responsable fishkeeper who is interested in looking after fish to the best of your abilities- if you cannot do anything about getting larger tanks for your fish, IMHO you should definately rehome them.
. He also picked up alot of hair off the carpet from my dog so I had to fish that out of the fish tank. Just wanted to share the story 
